4 3/8 x 4 3/8 x 2 1/2 in ECT-32 White Corrugated Mailers 50/Bundle MLR5
$26.58
/ bundle of 50$0.53 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
4 3/8" × 4 3/8" × 2 1/2"
Board / material
ECT-32-B Corrugated
Color
White
Freight class
Class 125
Specifications
| Inside dimensions | 4 3/8" × 4 3/8" × 2 1/2" (L × W × H) |
|---|---|
| Board / material | ECT-32-B Corrugated |
| Color | White |
| Sold as | Bundle of 50 |
| Order in multiples of | 50 |
| Bundle weight | 6.44 lb |
| Outer carton (shipping) | 17.5 × 14.0 × 6.0 in |
| LTL freight class | Class 125 |
| SKU | MLR5 |
About this item
SKU MLR5 — 4 3/8" × 4 3/8" × 2 1/2", ECT-32-B Corrugated, White. Sold as a bundle of 50, shipped from US warehouses.
4 3/8 x 4 3/8 x 2 1/2" white corrugated mailers in ECT-32 corrugated board, packed 50 per bundle (SKU MLR5); this is a second listing of the same BOX case stock at the same price.
Sized for shipping and fulfillment work; closes with tape or the built-in flap. Order by the bundle of 50.
Common questions
What does ECT-32-B rating mean for my shipping performance?
ECT (Edge Crush Test) 32-B means this corrugated material withstands 32 lbs of crush force per inch of edge length in both machine and cross directions. For small parcels under 5 lbs, this rating delivers protection during sorting, stacking, and transit while keeping material costs and weight-based shipping charges minimal.
How much setup labor does the fold-and-tuck design eliminate?
Assembly takes 3, 5 seconds per unit with zero additional supplies. Compared to glued or taped boxes, you eliminate tape gun operation, adhesive inventory management, and quality control checks, saving 30, 40% labor time on high-volume packing lines. One-piece construction also reduces damage-in-warehouse incidents from tape misalignment.
Will these mailers stack efficiently in my warehouse?
Yes. When folded flat, 50-unit bundles occupy minimal shelf space (approximately 8" x 6" x 4"). The rigid ECT-32-B corrugated supports stable stacking of multiple bundles without compression, maximizing vertical storage and reducing picking time during fulfillment operations.
Are these mailers compatible with USPS, UPS, and FedEx sizing rules?
Yes. At 4 3/8" x 4 3/8" x 2 1/2", these mailers fall within USPS Priority Mail, UPS Ground, and FedEx Home Delivery maximum dimensions, eliminating oversized surcharges. The compact form factor is optimized for regional parcel networks, ensuring predictable freight and handling costs at scale.
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.