Colección: Shipping Mailers & Envelopes | Poly, Bubble, Kraft & Thermal
Ship apparel, books, accessories, documents, electronics and temperature-sensitive products with shipping mailers and envelopes from Gpack Supplies. This general collection includes poly mailers, poly bubble mailers, kraft bubble mailers, insulated thermal mailers and adhesive packing list envelopes for commercial fulfillment and shipping.
Choose lightweight self-sealing poly mailers for non-fragile merchandise, padded bubble mailers for products requiring cushioning, kraft padded envelopes for a traditional paper exterior and foil-lined thermal mailers for insulated shipments. Multiple sizes and commercial case quantities are available for e-commerce, retail, warehouses and distribution centers.
Complete each shipment with packing list envelopes for invoices, packing slips and shipping documents. Gel ice packs are also available for selected temperature-sensitive packaging systems. Always choose the mailer size, cushioning and insulation according to the product and transportation conditions.
Local pickup and fast delivery options available in Miami and Broward.
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Poly Mailer Shipping Bags – Multiple Sizes & Case Quantities
Precio habitual A partir de $35.00 USDPrecio habitual -
Poly Bubble Mailers
Precio habitual A partir de $22.00 USDPrecio habitual -
Kraft Bubble Mailers - Padded Envelopes
Precio habitual A partir de $21.00 USDPrecio habitual -
Packing List Envelopes
Precio habitual A partir de $19.00 USDPrecio habitual -
Thermal Bubble Mailers - Insulated Envelopes
Precio habitual A partir de $47.00 USDPrecio habitual -
Kraft Bubble Mailers #000 – Padded Envelopes – 4 x 8 – 500 Case
Precio habitual $45.00 USDPrecio habitual -
Kraft Bubble Mailers #00 – Padded Envelopes – 5 x 10 – 250 Case
Precio habitual $32.00 USDPrecio habitual -
Kraft Bubble Mailers #0 – Padded Envelopes – 6.5 x 10 – 250 Case
Precio habitual $34.00 USDPrecio habitual -
Kraft Bubble Mailers #1 – Padded Envelopes – 7.25 x 12 – 100 Case
Precio habitual $21.00 USDPrecio habitual -
Kraft Bubble Mailers #2 – Padded Envelopes – 8.5 x 12 – 100 Case
Precio habitual $24.00 USDPrecio habitual -
Kraft Bubble Mailers #3 – Padded Envelopes – 8.5 x 14.5 – 100 Case
Precio habitual $25.00 USDPrecio habitual -
Kraft Bubble Mailers #4 – Padded Envelopes – 9.5 x 14.5 – 100 Case
Precio habitual $27.00 USDPrecio habitual -
Kraft Bubble Mailers #5 – Padded Envelopes – 10.5 x 16 – 100 Case
Precio habitual $32.00 USDPrecio habitual -
Kraft Bubble Mailers #6 – Padded Envelopes – 12.5 x 19 – 50 Case
Precio habitual $25.00 USDPrecio habitual -
Kraft Bubble Mailers #7 – Padded Envelopes – 14.5 x 20 – 50 Case
Precio habitual $28.00 USDPrecio habitual -
Packing List Envelopes – 4.5 x 5.5 – 1000 Case
Precio habitual $23.00 USDPrecio habitual -
Packing List Envelopes – 5.5 x 10 – 1000 Case
Precio habitual $45.00 USDPrecio habitual -
Packing List Envelopes – 9.5 x 12 – 500 Case
Precio habitual $50.00 USDPrecio habitual -
Packing List Envelopes – 7.5 x 5.5 – 1000 Case
Precio habitual $39.00 USDPrecio habitual -
Thermal Bubble Mailers 6 x 6.5 – Insulated Padded Envelopes – 250 Case
Precio habitual $55.00 USDPrecio habitual -
Thermal Bubble Mailers 6 x 10.5 – Insulated Padded Envelopes – 100 Case
Precio habitual $48.00 USDPrecio habitual -
Thermal Bubble Mailer 8" x 11" 100 Case
Precio habitual $48.00 USDPrecio habitual -
Thermal Bubble Mailers 10 x 10.5 – Insulated Padded Envelopes – 100 Case
Precio habitual $54.00 USDPrecio habitual -
Thermal Bubble Mailers 12.75 x 10.5 – Insulated Padded Envelopes – 100 Case
Precio habitual $98.00 USDPrecio habitual
Shipping Mailers and Envelopes for E-Commerce, Retail and Fulfillment
Shipping mailers and envelopes provide a practical alternative to corrugated boxes for apparel, books, accessories, documents, replacement parts, cosmetics and other products that do not require a large rigid container. Choosing the correct mailer can reduce package weight, unused space and packing time while maintaining suitable protection for the merchandise.
Gpack Supplies offers a broad collection of poly mailers, poly bubble mailers, kraft bubble mailers, thermal insulated mailers and packing list envelopes. Gel ice packs are also available for selected temperature-sensitive packaging systems.
This general mailers collection supports e-commerce sellers, retailers, fulfillment centers, warehouses, subscription businesses, pharmacies, food companies and commercial shipping departments. Available formats range from compact 4" x 8" padded envelopes to large 24" x 36" poly shipping bags.
The correct mailer depends on product dimensions, fragility, weight, temperature requirements and transportation conditions. Flexible bags should not be used as a substitute for rigid boxes when products can bend, break, crush or puncture the packaging.
Types of Shipping Mailers Available from Gpack Supplies
| Mailer Type | Construction | Best Applications |
|---|---|---|
| Poly mailers | Lightweight polyethylene film with self-seal closure | Apparel, textiles, soft goods and non-fragile products |
| Poly bubble mailers | Poly exterior with interior bubble cushioning | Accessories, books, cosmetics, electronics and small parts |
| Kraft bubble mailers | Kraft paper exterior with interior bubble cushioning | Documents, books, jewelry, accessories and retail merchandise |
| Thermal bubble mailers | Reflective foil layer with bubble insulation | Selected food, cosmetic, pharmaceutical and temperature-sensitive shipments |
| Packing list envelopes | Clear adhesive document pouch | Packing slips, invoices, return forms and shipping documents |
| Gel ice packs | Sealed cooling packs filled with thermal gel | Cold-chain packaging used with suitable insulated systems |
Poly Mailers for Lightweight Non-Fragile Products
Poly mailers are lightweight shipping bags made from flexible polyethylene film. They are commonly used for apparel, textiles, bedding, accessories and other non-fragile merchandise that does not require cushioning or rigid protection.
The self-sealing adhesive strip allows employees to close the package without packing tape in many applications. Once the release liner is removed, the flap is folded and pressed firmly against the bag.
Poly mailers are water-resistant and help protect merchandise from ordinary dirt and moisture encountered during transportation. They should not be described as completely waterproof because seams, closures or punctures may allow water to enter.
Flexible construction allows the mailer to conform to the product and can reduce unused package volume. This may help limit dimensional weight compared with an oversized corrugated box.
Poly Mailer Sizes Available
| Poly Mailer Size | Case Quantity | Typical Uses |
|---|---|---|
| 6" x 9" | 1,000 | Small apparel, accessories and compact soft goods |
| 7.5" x 10.5" | 1,000 | T-shirts, fabric products and small retail merchandise |
| 9" x 12" | 1,000 | Shirts, accessories and lightweight e-commerce orders |
| 10" x 13" | 1,000 | Apparel, books with added protection and general soft goods |
| 12" x 15.5" | 500 | Multiple garments and medium retail orders |
| 14.5" x 19" | 500 | Jackets, folded clothing and larger soft products |
| 19" x 24" | 200 | Bedding, coats, larger textiles and bulky merchandise |
| 24" x 24" | 300 | Large soft goods and wide folded products |
| 24" x 36" | 100 | Oversized apparel, blankets and bulky lightweight items |
Poly Bubble Mailers for Lightweight Cushioning
Poly bubble mailers combine a durable polyethylene exterior with an interior layer of bubble cushioning. This construction provides more impact and abrasion protection than a standard unpadded poly mailer.
The smooth poly exterior resists ordinary moisture and provides a suitable surface for shipping labels, barcodes and handling information.
Bubble mailers are useful for jewelry, cosmetics, books, accessories, replacement parts, small electronics and other merchandise that requires light cushioning but not a rigid shipping box.
The bubble layer should not be treated as complete protection for highly fragile, crush-sensitive or expensive products. Those items may require a corrugated box, additional cushioning or both.
Kraft Bubble Mailers for Padded Paper-Exterior Shipping
Kraft bubble mailers combine a traditional kraft-paper exterior with a cushioned bubble lining. They provide a familiar professional appearance for retail, office and e-commerce shipments.
The paper exterior accepts labels, stamps, handwriting and printed identification. The interior bubble layer helps protect merchandise from ordinary bumps, rubbing and abrasion.
Kraft bubble envelopes are commonly used for books, documents, jewelry, accessories, media, cosmetic products and small parts.
Because the exterior is paper-based, kraft mailers generally provide less moisture resistance than poly bubble mailers. Use a suitable inner bag when the product requires additional protection from humidity or water exposure.
Poly Bubble Mailers vs. Kraft Bubble Mailers
| Feature | Poly Bubble Mailer | Kraft Bubble Mailer |
|---|---|---|
| Exterior material | Polyethylene film | Kraft paper |
| Moisture resistance | Higher | Lower |
| Appearance | Smooth, lightweight plastic exterior | Traditional kraft-paper exterior |
| Labeling surface | Best with pressure-sensitive shipping labels | Accepts labels, stamps and handwriting |
| Best use | Moisture-resistant lightweight shipping | Retail, office and traditional padded-envelope shipping |
Common Bubble Mailer Sizes from #000 to #7
| Mailer Number | Listed Size | Case Quantity |
|---|---|---|
| #000 | 4" x 8" | 500 |
| #00 | 5" x 10" | 250 |
| #0 | 6.5" x 10" | 250 |
| #1 | 7.25" x 12" | 100 |
| #2 | 8.5" x 12" | 100 |
| #3 | 8.5" x 14.5" | 100 |
| #4 | 9.5" x 14.5" | 100 |
| #5 | 10.5" x 16" | 100 |
| #6 | 12.5" x 19" | 50 |
| #7 | 14.5" x 20" | 50 |
Numbered mailer sizes are general industry references. Usable interior dimensions can vary because of seams, flap construction and bubble thickness. Test the actual product before ordering a large quantity.
Thermal Bubble Mailers for Insulated Shipping
Thermal bubble mailers combine reflective foil with an air-filled bubble layer to slow heat transfer around temperature-sensitive products.
These insulated envelopes are useful for selected food, cosmetic, supplement, pharmaceutical and laboratory shipments where lightweight thermal protection is needed.
A thermal mailer does not actively cool the product. Gel packs or another conditioned coolant may be required depending on the product, transit time and external conditions.
The complete packaging configuration should be tested before it is used for products that must remain inside a specific temperature range.
Thermal Mailer Sizes Available
| Thermal Mailer Size | Case Quantity | Typical Uses |
|---|---|---|
| 6" x 6.5" | 250 | Compact samples, cosmetics and small temperature-sensitive items |
| 6" x 10.5" | 100 | Small food products, pharmacy orders and samples |
| 8" x 11" | 100 | Medium insulated shipments and compact cold packs |
| 10" x 10.5" | 100 | Food kits, cosmetics and medium temperature-sensitive goods |
| 12.75" x 10.5" | 100 | Wider products and insulated e-commerce shipments |
| 11" x 15" | 50 | Larger temperature-sensitive products and meal components |
Gel Ice Packs for Insulated Mailers
Gel ice packs add cooling mass to an insulated packaging system. Gpack Supplies offers 8 oz and 16 oz formats in commercial case quantities.
The 8 oz pack is useful for compact mailers, samples and small products. The 16 oz pack provides more cooling mass for larger packages and longer routes.
The number and placement of gel packs should be established through representative testing. More coolant is not always better because products sensitive to freezing can be damaged by direct contact with frozen packs.
Use sealed product packaging and absorbent materials when condensation or leakage may affect the shipment.
Packing List Envelopes for Shipping Documents
Packing list envelopes are adhesive document pouches that attach invoices, packing slips, return forms and other shipping records to the outside of boxes, pallets and freight.
The clear front allows shipping documents to remain visible while the plastic pouch protects them from dirt, abrasion and ordinary moisture.
To apply the pouch, insert the document, remove the release liner and press the adhesive backing firmly against a clean, dry package surface.
Place the envelope where it does not cover shipping labels, hazardous-material markings, barcodes, carton seams or required handling information.
Packing List Envelope Sizes Available
| Envelope Size | Case Quantity | Typical Documents |
|---|---|---|
| 4.5" x 5.5" | 1,000 | Small packing slips, labels and folded documents |
| 5.5" x 10" | 1,000 | Long documents, invoices and folded letter-size sheets |
| 7.5" x 5.5" | 1,000 | Medium packing slips, return forms and shipment records |
| 9.5" x 12" | 500 | Larger documents, multiple sheets and commercial freight paperwork |
How to Choose the Correct Shipping Mailer
Identify the Product Type
Soft, non-fragile merchandise may be suitable for a standard poly mailer. Products requiring light cushioning may need a poly or kraft bubble mailer.
Measure the Product
Measure the product after folding, wrapping or adding inner packaging. Include thickness, not only length and width.
Allow Space for Closure
Leave enough unused flap area for the adhesive strip to close securely without tension.
Consider Fragility
A mailer is not appropriate when the product can be crushed, bent or broken during carrier handling.
Evaluate Moisture Exposure
Poly exteriors offer better ordinary moisture resistance than paper-based kraft exteriors.
Review Temperature Requirements
Temperature-sensitive products may require a thermal mailer, gel packs, absorbent materials and tested transit procedures.
Test Before Ordering Cases
Pack and ship a representative product before committing to a large commercial quantity.
How to Measure a Product for a Mailer
- Place the product in its finished folded or wrapped condition.
- Measure the widest point.
- Measure the longest point.
- Measure the product thickness.
- Add extra width to accommodate thickness.
- Add extra length for product thickness and flap closure.
- Confirm that the product can enter the opening without forcing it.
- Leave enough flap area for a complete adhesive bond.
- Test the finished package with the shipping label attached.
How to Pack a Poly Mailer
- Confirm that the product is suitable for flexible packaging.
- Fold apparel or textiles neatly.
- Use an inner bag when additional cleanliness or moisture protection is needed.
- Insert the product without stretching the seams excessively.
- Remove unnecessary trapped air.
- Peel the release liner from the adhesive strip.
- Fold the flap evenly across the opening.
- Press the adhesive strip firmly from one side to the other.
- Apply the shipping label to a flat visible area.
- Inspect the seams and closure before shipping.
How to Pack a Bubble Mailer
- Select a mailer large enough for the product without excessive empty space.
- Add an inner bag if the product requires moisture protection.
- Wrap delicate surfaces with tissue, foam or another suitable material.
- Insert the product carefully without forcing it through the opening.
- Confirm that the contents do not strain the side seams.
- Remove the adhesive release liner.
- Fold the flap evenly and press the closure firmly.
- Add packing tape only when additional closure reinforcement is appropriate.
- Place the shipping label on a smooth exterior area.
- Inspect the finished package for punctures or weak seams.
When to Use a Mailer Instead of a Box
Mailers are suitable when products are lightweight, compact and not highly vulnerable to crushing. Clothing, textiles, soft accessories and padded small items are common examples.
Flexible mailers can reduce package weight and unused space and may require less packing material than boxes.
Use a corrugated box when the product is rigid, fragile, sharp, heavy, valuable or sensitive to bending.
A box is also preferable when multiple products must remain organized or when the shipment requires substantial void fill.
Shipping Mailers Compared with Corrugated Boxes
| Packaging Format | Main Advantage | Main Limitation |
|---|---|---|
| Poly mailer | Lightweight and space-efficient | No rigid or impact protection |
| Bubble mailer | Built-in lightweight cushioning | Limited crush resistance |
| Thermal mailer | Lightweight insulation | Requires validation for controlled temperatures |
| Corrugated box | Rigid protection and stacking strength | Higher weight and more storage space |
Common Shipping Mailer Problems
The Mailer Is Too Tight
A tight mailer can strain the seams, reduce adhesive contact and create an uneven shipping-label surface.
The Product Moves Excessively
Select a smaller mailer or add suitable interior protection. Too much empty space can increase movement.
The Adhesive Flap Opens
The surface may be dusty, the flap may be under tension or the closure may not have been pressed firmly.
The Mailer Punctures
Sharp edges, exposed corners or heavy products may require additional wrapping or a corrugated box.
The Shipping Label Lifts
Apply labels to a clean, flat surface and avoid wrinkles, seams and heavily textured areas.
The Product Arrives Crushed
The item may require rigid packaging rather than a flexible mailer.
Best Practices for Shipping Mailers and Envelopes
- Match the mailer type to the product’s fragility.
- Measure the finished product, including thickness.
- Leave enough space for a secure flap closure.
- Do not overfill or stretch mailer seams.
- Use inner bags for moisture-sensitive merchandise.
- Protect sharp edges before insertion.
- Use corrugated boxes for crush-sensitive products.
- Press self-seal closures firmly across the full width.
- Apply shipping labels to flat, clean surfaces.
- Keep barcodes free from wrinkles and seams.
- Validate thermal packaging for sensitive products.
- Keep packing documents visible but separate from carrier labels.
- Test actual shipments before ordering large quantities.
- Inspect every package before carrier pickup.
How to Store Shipping Mailers
Store mailers in a clean, dry and covered warehouse area. Keep them inside their original cartons until needed.
Protect poly mailers, bubble mailers and thermal envelopes from direct sunlight, excessive heat, open flames and sharp warehouse equipment.
Kraft mailers should be kept away from moisture and high humidity because paper exteriors can absorb water and lose strength.
Do not place heavy merchandise on top of mailer cases. Compression can damage cushioning, deform openings and wrinkle adhesive flaps.
Organize inventory by mailer type, number, dimensions and case quantity so packing employees can select the correct product quickly.
Industries That Use Shipping Mailers and Envelopes
- E-commerce retailers
- Clothing and apparel companies
- Jewelry and accessory businesses
- Book and media sellers
- Cosmetic and skincare brands
- Electronics and parts suppliers
- Pharmacies and medical distributors
- Food and meal-kit businesses
- Subscription-box companies
- Warehouses and fulfillment centers
- Retail stores
- Third-party logistics providers
- Wholesale distributors
- Courier and delivery operations
- Commercial shipping departments
Frequently Asked Questions About Shipping Mailers and Envelopes
What types of shipping mailers does Gpack Supplies offer?
Gpack Supplies offers poly mailers, poly bubble mailers, kraft bubble mailers, thermal insulated mailers and packing list envelopes.
What are poly mailers used for?
Poly mailers are used for apparel, textiles, accessories and other lightweight non-fragile products.
Are poly mailers waterproof?
They are water-resistant but should not be considered completely waterproof.
Do poly mailers have a self-seal closure?
Yes. The poly mailers in this collection use a peel-and-seal adhesive flap.
What is the largest poly mailer available?
The largest listed size is 24" x 36".
What is the smallest poly mailer available?
The smallest listed size is 6" x 9".
What are poly bubble mailers used for?
They are used for lightweight products that require cushioning and moisture-resistant exterior protection.
What are kraft bubble mailers used for?
Kraft bubble mailers are used for books, accessories, documents, jewelry and other products requiring light cushioning.
What is the difference between poly and kraft bubble mailers?
Poly bubble mailers have a plastic exterior with better moisture resistance, while kraft mailers have a paper exterior.
Do bubble mailers replace shipping boxes?
Not for highly fragile, heavy or crush-sensitive products.
What bubble-mailer numbers are available?
Available numbered sizes range from #000 through #7.
Are poly and kraft numbered mailers the same dimensions?
The listed sizes are similar, but actual usable dimensions can vary by construction and manufacturer.
What is a thermal bubble mailer?
It is an insulated envelope combining reflective material with an air-filled bubble layer.
Do thermal mailers keep products cold by themselves?
No. They slow heat transfer but may require conditioned gel packs or another cooling source.
Can thermal mailers be used for food?
They may be used as part of a tested packaging system appropriate for the specific food product.
Can thermal mailers be used for pharmaceuticals?
They may form part of a pharmaceutical shipping system, but temperature-controlled products require validated procedures.
What gel-pack sizes are available?
This collection includes 8 oz and 16 oz gel ice packs.
How many 8 oz gel packs come in a case?
The 8 oz gel packs are packaged with 80 packs per case.
How many 16 oz gel packs come in a case?
The 16 oz gel packs are packaged with 40 packs per case.
What are packing list envelopes used for?
They attach packing slips, invoices, return forms and other shipping documents to packages.
Are packing list envelopes adhesive?
Yes. They have a pressure-sensitive adhesive backing for application to compatible surfaces.
Can packing list envelopes be used on poly mailers?
They can be used when the adhesive bonds properly to the specific mailer surface.
How do I choose the correct mailer size?
Measure the finished product and add enough room for thickness, insertion and secure flap closure.
Should a mailer fit tightly?
No. Excessive tension can strain seams and weaken the closure.
Can I ship clothing in a poly mailer?
Yes. Clothing and other soft merchandise are among the most common poly-mailer applications.
Can books be shipped in bubble mailers?
Some books can be shipped in padded mailers, but valuable or crush-sensitive books may need rigid packaging.
Can electronics be shipped in bubble mailers?
Small durable accessories may be suitable, while fragile electronics generally require additional protection or a box.
Can shipping labels be applied directly to mailers?
Yes. Apply the label to a clean, flat surface without wrinkles or seams.
How should mailers be stored?
Store them in a clean, dry area away from heat, sunlight, moisture and sharp objects.
Does Gpack Supplies sell mailers by the case?
Yes. Gpack Supplies offers commercial case quantities in multiple styles and sizes.
Is local pickup available in Miami?
Local pickup and fast delivery options available in Miami and Broward.
Sobres y mailers para envíos, e-commerce y fulfillment
Los sobres y mailers permiten enviar ropa, accesorios, libros, documentos, cosméticos y productos pequeños con menos peso y espacio que muchas cajas corrugadas.
Gpack Supplies ofrece poly mailers, poly bubble mailers, kraft bubble mailers, thermal insulated mailers y packing list envelopes. También ofrecemos gel ice packs para sistemas de empaque sensibles a la temperatura.
Tipos disponibles
- Poly mailers con cierre autoadhesivo
- Poly bubble mailers con acolchado interior
- Kraft bubble mailers con exterior de papel
- Thermal bubble mailers con aislamiento reflectivo
- Packing list envelopes para documentos
- Gel packs de 8 oz y 16 oz
Los poly mailers son ideales para ropa y productos no frágiles. Son ligeros, flexibles y resistentes a humedad moderada.
Los sobres bubble mailers ofrecen acolchado para productos pequeños. Los modelos poly ofrecen mayor resistencia a la humedad, mientras que los kraft tienen un exterior de papel tradicional.
Los thermal mailers ayudan a reducir la transferencia de calor, pero no mantienen una temperatura específica por sí solos. Pueden necesitar gel packs y un sistema validado.
Los packing list envelopes permiten colocar facturas, packing slips y documentos en la parte exterior de cajas, pallets y paquetes.
Para seleccionar el tamaño correcto, mida el producto completamente empacado e incluya el grosor. Deje suficiente espacio para cerrar la solapa adhesiva sin estirar el sobre.
Utilice cajas corrugadas para productos pesados, frágiles, afilados o sensibles a golpes y compresión.
Local pickup and fast delivery options available in Miami and Broward.