9x12" White Redi-Seal Envelopes, 28 lb. Paper - Case of 500
$197.60
/ case of 500$0.40 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
9" × 12"
Board / material
28 lb. Paper Stock
Color
White
Freight class
Class 78
Specifications
| Inside dimensions | 9" × 12" (L × W) |
|---|---|
| Board / material | 28 lb. Paper Stock |
| Color | White |
| Sold as | Case of 500 |
| Order in multiples of | 1 |
| Case weight | 20.96 lb |
| Outer carton (shipping) | 15.0 × 13.0 × 10.25 in |
| LTL freight class | Class 78 |
| GTIN | 50085227435175 |
| SKU | EN1047 |
About this item
SKU EN1047 — 9" × 12", 28 lb. Paper Stock, White. Sold as a case of 500, shipped from US warehouses.
The 9x12" White Redi-Seal Envelopes, 28 lb. Paper 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; 28 lb; case of 500. Use it as a mailing envelope, poly mailer, padded mailer, or flat document shipper when the item fits the listed size.
Common questions
Do these envelopes require water or moisture to seal?
No. Redi-Seal envelopes feature a pre-applied self-adhesive strip. Simply fold down the flap and press firmly, no moisture, sponge, or tape needed. This saves time and reduces mailroom processing costs.
Are these envelopes shipping-compliant and durable enough for standard mail?
Yes. The 28 lb. paper stock provides excellent durability to withstand postal handling, sorting machinery, and transit conditions. They meet USPS and carrier standards for business mail and first-class shipping.
What documents fit in a 9 x 12 inch envelope?
The 9 x 12" size accommodates standard 8.5 x 11" documents without folding, plus photos, light merchandise, catalogs, and bulk business correspondence. It's ideal for invoices, letters, and marketing materials.
How many cases should we order for monthly mailroom volume?
Each case contains 500 envelopes. For high-volume operations, calculate your average monthly mail volume and order accordingly. Bulk purchasing provides cost savings and ensures consistent inventory levels. Contact our B2B team for volume pricing and delivery scheduling.
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.