Good fit for shipments or presentation packs where the product fits the listed inside dimensions and closure style. Confirm inside dimensions, board type, closure, color, and whether the item needs extra cushioning.

Best For
How to choose
Specs at a Glance
| Material | ECT-32-B White Corrugated |
| Dimensions | 5" L x 4" W x 4" H |
| Construction | One-Piece Fold-and-Tuck Design |
| Quantity Per Bundle | 50 Mailers |
| Recyclable | Yes |
Common Use Cases
- Packing small ecommerce orders, kits, samples, gifts, documents, or parts in a folding mailer box.
- Standardizing a branded or unbranded mailer-box size for repeat shipments.
- 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 Bundle of 50. Check the current product page for variant details, price, availability, and pack count before checkout.
Shipping & Packaging
Frequently Asked Questions
ECT (Edge Crush Test) 32-B means these mailers withstand 32 lbs per inch of edge crush force. This rating ensures your packages stay protected during handling, conveyor processing, and stacking in warehouses, reducing damage claims and returns.
Operators can assemble and seal these mailers in 3-5 seconds without tape, glue, or staples. For a 500-box daily volume, you'll save approximately 30-40 minutes per shift compared to traditional taped boxes.
Yes. The 5 x 4 x 4" interior dimension is optimized for items under 5 lbs, including electronics, cosmetics, jewelry, clothing, and books. Double-wall construction protects fragile contents without excessive dimensional weight charges.
Lightweight corrugated construction lowers DIM weight charges on UPS, FedEx, and USPS. Bundled pricing at 50 units per pack also reduces per-unit cost by 15-25% versus case quantities, directly improving your margin on small-parcel shipments.
Technical Specifications
| Construction | One-Piece Fold-and-Tuck Design |
| Quantity Per Bundle | 50 Mailers |
| Recyclable | Yes |
| Color | White |
| Strength / Material | ECT-32-B Corrugated |
| Dimensions (Internal) | 5" × 4" × 4" (L × W × H) |
Shipping Information
Outer Carton Dimensions
5" × 4" × 4" (L × W × H)
Unit of Measure
BUNDLE
Qty Per Shipping Unit
50 PER BUNDLE
LTL Freight Class
Class 125
Delivery Method
Shown at checkout
Processing and delivery timelines vary by product, warehouse, order size, and destination. Freight-sensitive or oversized items may require LTL delivery or a custom quote before shipment.
Checkout shows available shipping options for the selected SKU and quantity. Use the shipping and refund policy links for current policy details before ordering.
For larger, recurring, freight-sensitive, or mixed-SKU orders, send the SKU or product link, quantity, delivery ZIP code, receiving notes, and timing to support@packrift.com.
ORDER SUPPORT
Product Support
Specs, case quantities, and availability are listed on each product page. For bulk, mixed-SKU, or LTL freight orders, email support@packrift.com with the SKU, quantity, and delivery ZIP.
Use product support for fit, larger or recurring order, return, or order-issue questions. When price and Add to Cart are shown, checkout remains the direct ordering path.
Need a sample, fit check, or substitution review? Contact product support with the SKU, selected option, order quantity, and use case. Support will confirm the available path for that item.
Contact product supportBuyer guides
Buying notes and spec resources stay here instead of taking space above the cart.
Use this product as the source
5x4x4 ECT-32-B White Corrugated Mailers - Crush Resistant One-Piece Design, Bundle of 50
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Compare resources using the current product page data: SKU M544 , type Boxes - Mailers , sold-as unit BUNDLE / pack count 50 PER BUNDLE . Confirm the product page price, availability, and selected variant before ordering.
Compare usable size, padding, material, closure, and case quantity.
Product support Compare mailer vs boxUse this guide when item thickness or edge protection affects fit.



