9x12 Poly Mailers - White Self-Seal, 500/Case
$48.06
/ case of 500$0.10 per mailer
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Ships from the nearest of 5 US warehouses · freight calculated at checkout
30-day returns on stock items · Return policy
Inside dimensions
9" × 12"
Board / material
2.5 Mil Polyethylene
Color
White
Freight class
Class 60
Specifications
| Inside dimensions | 9" × 12" (L × W) |
|---|---|
| Board / material | 2.5 Mil Polyethylene |
| Color | White |
| Sold as | Case of 500 |
| Order in multiples of | 1 |
| Case weight | 12.04 lb |
| Outer carton (shipping) | 15.0 × 10.0 × 4.0 in |
| LTL freight class | Class 60 |
| GTIN | 841436024211 |
| SKU | B873 |
About this item
SKU B873 — 9" × 12", 2.5 Mil Polyethylene, White. Sold as a case of 500, shipped from US warehouses.
The 9x12 White Poly Mailers with Tear Strip - Self-Seal, 2.5 Mil is a shipping mailer for documents, catalogs, apparel, small parts, photos, and lightweight e-commerce orders. Listed specs include size 9" x 12"; white material; 2.5 Mil; case of 500. Use it as a mailing envelope, poly mailer, padded mailer, or flat document shipper when the item fits the listed size.
Poly mailers: Good fit for shipping clothing, apparel, accessories, documents, returns, and other lightweight non-fragile ecommerce orders. These mailers help ecommerce teams and small businesses choose protective, right-sized packaging for common fulfillment workflows.
Common questions
Will labels and shipping stamps stick reliably to these mailers?
Yes. The white outer surface is engineered for excellent ink and label adhesion. Stamps, handwritten text, and thermal shipping labels all adhere securely without slipping or peeling during transit.
How does the self-seal tear strip work compared to traditional tape?
The integrated tear strip provides a peel-and-seal closure that requires no additional tape, tape dispenser, or sealing equipment. Simply peel the strip, press for 3-5 seconds, and the mailer is permanently sealed, faster and more consistent than tape application.
Are these mailers truly waterproof and puncture-resistant?
The 2.5 mil polyethylene construction resists punctures, tears, and moisture penetration. High-strength seams prevent bursting under pressure. However, they are water-resistant rather than completely waterproof, suitable for most shipping conditions but not full water immersion scenarios.
What's the difference between the white exterior and silver interior?
The white exterior provides a professional, branded appearance ideal for customer-facing presentation, while the silver interior offers moisture barrier properties and opacity for light-sensitive contents. This dual-layer design maximizes both aesthetics and protection.
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.