9x12 28 lb Kraft Self-Seal Envelopes 500/Case EN1033
$124.54
/ case of 500$0.25 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
28 lb. Paper Stock
Color
Kraft
Freight class
Class 78
Specifications
| Inside dimensions | 9" × 12" (L × W) |
|---|---|
| Board / material | 28 lb. Paper Stock |
| Color | Kraft |
| Sold as | Case of 500 |
| Order in multiples of | 1 |
| Case weight | 20.54 lb |
| Outer carton (shipping) | 14.0 × 12.5 × 10.0 in |
| LTL freight class | Class 78 |
| SKU | EN1033 |
About this item
SKU EN1033 — 9" × 12", 28 lb. Paper Stock, Kraft. Sold as a case of 500, shipped from US warehouses.
9x12" kraft self-seal envelopes in paper stock, packed 500 per case (SKU EN1033); 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
Do these envelopes require moisture or additional sealing equipment?
No. Simply peel off the tear strip and press to seal. The pre-applied adhesive eliminates the need for water, sponges, or tape, reducing sealing time and labor costs significantly.
What is the tear strip and why does it matter?
The tear strip protects the adhesive from dust, dirt, and humidity during storage and shipping. This extends shelf life and ensures every envelope seals reliably, reducing waste from failed seals.
Are these envelopes opaque enough to hide contents?
Yes. The 28 lb. kraft paper stock is fully opaque, preventing anyone from seeing inside without opening the envelope, essential for confidential documents, invoices, and sensitive mailings.
What size documents fit in a 9" x 12" envelope?
These envelopes accommodate standard 8.5" x 11" documents, booklets, catalogs, magazines, and multi-page sets. They're classified as booklet-size, making them ideal for documents requiring protection beyond standard letter envelopes.
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.