9x12 5 Mil Self-Seal Poly Mailers 1000/Case B869
$115.70
/ case of 1000$0.12 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 1000 |
| Order in multiples of | 1 |
| Case weight | 21.36 lb |
| Outer carton (shipping) | 14.5 × 10.0 × 6.5 in |
| LTL freight class | Class 60 |
| SKU | B869 |
About this item
SKU B869 — 9" × 12", 2.5 Mil Polyethylene, White. Sold as a case of 1000, shipped from US warehouses.
9x12" self-seal poly mailers in 5 mil polyethylene film, packed 1000 per case (SKU B869); 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 1000.
Common questions
Are these mailers waterproof and moisture-resistant?
Yes. The 2.5 mil polyethylene construction provides complete water and moisture resistance, protecting contents from humidity and environmental exposure during transit and storage.
Can I apply labels and custom stamps to these mailers?
Absolutely. The white exterior surface has excellent adhesion properties for labels, stamps, ink, and thermal printing, allowing straightforward branding and address application without slipping or peeling.
How durable is the self-seal closure?
The self-seal strip is designed for secure, tamper-evident closure on first application. The high-strength seams prevent opening even with overpacking, ensuring your products arrive intact.
What products work best in 9 x 12" mailers?
These mailers accommodate lightweight apparel, accessories, small electronics, jewelry, books, documents, and subscription items. The size balances usable space with cost efficiency for e-commerce brands.
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.