5.5 x 3.125" Kraft Gummed Envelopes - Secure 28lb Paper, Case of 5000
$450.60
/ case of 5000$0.09 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
5 1/2" × 3.125"
Board / material
28 lb. Paper Stock
Color
Kraft
Freight class
Class 78
Specifications
| Inside dimensions | 5 1/2" × 3.125" (L × W) |
|---|---|
| Board / material | 28 lb. Paper Stock |
| Color | Kraft |
| Sold as | Case of 5000 |
| Order in multiples of | 1 |
| Case weight | 35.24 lb |
| Outer carton (shipping) | 17.0 × 15.0 × 12.25 in |
| LTL freight class | Class 78 |
| GTIN | 50085227505625 |
| SKU | EN1030 |
About this item
SKU EN1030 — 5 1/2" × 3.125", 28 lb. Paper Stock, Kraft. Sold as a case of 5000, shipped from US warehouses.
Secure your small items with these kraft gummed envelopes featuring heavily gummed flaps and durable 28 lb. paper stock. Sized at 5.5 " x 3.125 " and sold by the case of 5000, these opaque coin envelopes provide reliable protection and tamper-evident sealing for mailroom, banking, and retail operations.
Common questions
Are these envelopes USPS-compliant for mailing?
Yes. These 5 1/2" x 3 1/8" kraft gummed envelopes meet USPS size and sealing standards for domestic mail. The heavy-duty gummed flap creates a secure, compliant seal for worry-free processing through postal systems.
Why choose gummed flaps over self-sealing?
Gummed flaps provide tamper-evidence, are more cost-effective per unit, offer longer shelf life without adhesive degradation, and create a traditional, professional appearance trusted in financial and formal business environments.
What's the weight capacity and durability of 28 lb. paper?
28 lb. kraft stock provides durability for coins, small documents, and lightweight items up to several ounces. This weight resists tearing during automated sorting and handling while remaining cost-efficient compared to heavier materials.
How does the opaque kraft material benefit bulk mailings?
Opaque kraft blocks visibility of contents, essential for protecting financial transactions, donations, and sensitive items. This privacy feature reduces theft risk, builds customer confidence, and maintains a professional brand appearance across high-volume mailroom operations.
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.