12x15.5 5 Mil Self-Seal Poly Mailers 500/Case B870
$93.04
/ case of 500$0.19 per mailer
Request bulk pricing
Ships from the nearest of 5 US warehouses · freight calculated at checkout
30-day returns on stock items · Return policy
Inside dimensions
12" × 15 1/2"
Board / material
2.5 Mil Polyethylene
Color
White
Freight class
Class 60
Specifications
| Inside dimensions | 12" × 15 1/2" (L × W) |
|---|---|
| Board / material | 2.5 Mil Polyethylene |
| Color | White |
| Sold as | Case of 500 |
| Order in multiples of | 1 |
| Case weight | 18.96 lb |
| Outer carton (shipping) | 17.5 × 13.0 × 3.5 in |
| LTL freight class | Class 60 |
| SKU | B870 |
About this item
SKU B870 — 12" × 15 1/2", 2.5 Mil Polyethylene, White. Sold as a case of 500, shipped from US warehouses.
12x15.5" self-seal poly mailers in 5 mil polyethylene film, packed 500 per case (SKU B870); this is a second listing of the same BOX case stock at the same price.
Sized for shipping and fulfillment work; the self-seal closure needs no tape. Order by the case of 500.
Common questions
Will the self-seal closure hold during transit without additional tape?
Yes. The peel-and-seal strip is engineered for reliable adhesion throughout shipping. The high-strength seams work in tandem with the self-seal mechanism to keep contents secure. For extra protection on heavy items, we recommend reinforcing with packing tape at stress points.
Are these mailers waterproof and what level of moisture protection do they offer?
These 2.5 mil polyethylene mailers are water-resistant and protect contents from moisture exposure during typical shipping conditions. They are not submersion-proof but provide excellent protection against rain, condensation, and handling in wet environments, ideal for standard e-commerce logistics.
Can I print labels and apply branding directly to these mailers?
Absolutely. The white exterior surface is specifically designed for excellent label, stamp, and ink adhesion. You can apply shipping labels, logos, barcodes, and custom branding directly to the mailer for a cohesive, professional unboxing experience.
What size products fit in a 12 x 15 1/2" mailer?
These mailers are ideal for flat to slightly padded items up to approximately 2" thickness, including apparel (folded), accessories, small electronics, books, documents, and lightweight merchandise. The flexible polyethylene expands slightly to accommodate moderate overpacking without compromising seal integrity.
Order support
Questions on specs or freight?
Send the SKU, quantity, and delivery ZIP and we will confirm specs, availability, and freight before you order.