Professional-grade kraft gummed envelopes measuring 4 1/4" x 2 1/2" with heavily gummed flaps that deliver a tamper-resistant seal every time. Made from durable 28 lb. paper stock with opaque finish to protect contents. Sold as a full case of 5,000 envelopes‚the cost-effective choice for mailrooms and shipping departments.
In Stock SKU: EN1029

4 1/4 x 2 1/2" Kraft Gummed Envelopes - Secure Seal, 28 lb. Paper, Case of 5000

4 1/4 x 2 1/2" Kraft Gummed Envelopes - Secure Seal, 28 lb. Paper, Case of 5000. Use this item for small shipments where the item fits the listed usable mailer size and does not require a carton. Listed specs include size 4 x 2 in; material paper; sold as Case of 5000. Confirm SKU, pack count, price, availability, and checkout delivery before ordering.

$333.50 / CASE (5000 PER CASE)
Order timing and shipping options show at checkout
Delivery shown at checkout
Confirm this specSKU EN1029

4 1/4 x 2 1/2" Kraft Gummed Envelopes - Secure Seal, 28 lb. Paper, Case of 5000: compare by usable size, material, cushioning, closure, and case quantity. Confirm SKU, sold-as unit, price, availability, and checkout delivery before ordering.

Size
4 1/4 x 2 1/2 in
Material
28 lb. Paper Stock
Color
Kraft
Sold as
CASE (5000 PER CASE)
Freight class
78
Material
28 lb. Kraft Paper Stock
Dimensions
4 1/4" W x 2 1/2" H
Flap Type
Heavily Gummed
Good fit for

Good fit for small shipments where the item fits the listed usable mailer size and does not require a carton. Confirm usable size, closure style, cushioning, and whether the item needs a rigid box instead.

Check before ordering

Confirm size, material, fit, sold-as quantity, SKU, price, availability, and checkout delivery before ordering.

Buying a larger quantity, matching this to an existing SKU, or setting up a repeat order?

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Best For

Good fit for small shipments where the item fits the listed usable mailer size and does not require a carton. Confirm usable size, closure style, cushioning, and whether the item needs a rigid box instead.

How to Choose the Right Packaging

The buying decision should be based on the exact usable size, material, cushioning, closure, and case quantity, not the category name alone. Use the current product page as the source of truth for SKU, variant, price, availability, sold-as unit, and checkout delivery.

Specs at a Glance

Material28 lb. Kraft Paper Stock
Dimensions4 1/4" W x 2 1/2" H
Flap TypeHeavily Gummed
Quantity Per Case5,000 Envelopes
RecyclableYes
Common Use Cases
  • Shipping small ecommerce orders, samples, apparel, parts, or documents that fit the listed mailer size.
  • Reordering mailers by size, material, closure, and case quantity for packing stations.
  • Reordering by exact product link, SKU, or sold-as quantity.
  • Adding the item to a mixed-SKU or recurring supply request when quantity, delivery ZIP code, or timing matters.
What You'll Receive
  • This listing is sold as Case of 5000. Check the current product page for variant details, price, availability, and pack count before checkout.
Shipping & Packaging

Delivery options and timing are shown at checkout based on item and destination. For larger quantities, freight-sensitive items, mixed-SKU needs, or recurring supply, send the product link or SKU, quantity, delivery ZIP code, receiving notes, and timing to support@packrift.com.

Frequently Bought Together

Related supplies

Frequently Asked Questions

Yes. These 4 1/4" x 2 1/2" envelopes meet USPS standards for small flat mail when sealed properly. The gummed flap provides reliable closure that satisfies postal service requirements for secure sealing without additional tape.

Each case contains 5,000 envelopes, making this an economical bulk solution for high-volume mailers. Purchasing by the case significantly reduces per-unit cost compared to smaller quantities, improving operational efficiency for mailrooms and distribution centers.

Yes. These envelopes feature heavily gummed flaps engineered for industrial-strength sealing. The 28 lb. kraft paper resists tearing and puncturing, ensuring contents remain secure throughout the mailing and delivery process without requiring additional reinforcement.

These are designed as single-use envelopes. Once the gummed seal is activated with moisture and dried, the adhesive cannot be reactivated. For cost-effective high-volume operations, the bulk case pricing makes replacement economical for each mailing cycle.

Technical Specifications

Flap TypeHeavily Gummed
Quantity Per Case5,000 Envelopes
RecyclableYes
Color Kraft
Strength / Material 28 lb. Paper Stock
Dimensions (Internal) 4 1/4"" × 2 1/2"" (L × W × H)

Product Downloads

Shipping Information

Outer Carton Dimensions

14.5" × 13.75" × 9.75" (L × W × D)

Unit of Measure

CASE

Qty Per Shipping Unit

5000 PER CASE

LTL Freight Class

Class 78

Delivery Method

Shown at checkout

ORDER SUPPORT

Product Support

We aim to show product specs, case quantities, and availability clearly. Contact support if an item does not match the listed product details.

Secure checkout LTL freight available on case/skid orders

Buyer guides

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