4.375x4.375x3.5 Corrugated Mailers - ECT-32 White Crush Resistant, 50-Pack
$24.86
/ bundle of 50$0.50 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" × 3 1/2"
Board / material
ECT-32-B Corrugated
Color
White
Freight class
Class 125
Specifications
| Inside dimensions | 4 3/8" × 4 3/8" × 3 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 | 7.18 lb |
| Outer carton (shipping) | 20.0 × 14.0 × 6.0 in |
| LTL freight class | Class 125 |
| GTIN | 812578007943 |
| SKU | MLR2 |
About this item
SKU MLR2 — 4 3/8" × 4 3/8" × 3 1/2", ECT-32-B Corrugated, White. Sold as a bundle of 50, shipped from US warehouses.
The 4 3/8x4 3/8x3 1/2 White ECT-32 Corrugated Mailers - Crush Resistant is a corrugated mailer for books, catalogs, apparel, subscription kits, samples, documents, and small e-commerce orders. Listed specs include inside dimensions 4 3/8" x 4 3/8" x 3 1/2"; white material; ECT-32; bundle of 50. The mailer format works when the product needs a presentation-style carton or compact shipping box instead of a standard RSC case.
Ideal for shipping apparel, books, mugs, accessories, gifts, and small fragile items. A sturdy, reliable choice for small-business, Etsy, and ecommerce shippers.
Common questions
What does ECT-32-B corrugated rating mean for my operation?
ECT-32-B indicates edge crush test strength of 32 lbs per inch of width. This rating ensures reliable stacking performance up to 5-6 layers in typical warehouse conditions, reducing product damage and returns while maintaining structural integrity during automated sorting and handling.
How much assembly labor and tape does one-piece design save?
The fold & tuck design eliminates tape, glue, and stapling requirements, saving 8-12 seconds per box versus traditional RSC assembly. For high-volume fulfillment centers processing 1,000+ units daily, this reduces labor costs by 15-25% while eliminating tape inventory management.
Will these mailers pass carrier dimensional weight pricing thresholds?
Yes. At 4 3/8" x 4 3/8" x 3 1/2", this mailer is specifically engineered to remain below most carrier dimensional weight triggers while providing crush protection for small lightweight items, optimizing your cost per shipment.
Can I stack these mailers with product inside without crush damage?
ECT-32-B corrugated with double-wall construction on front and sides supports safe stacking of 5-6 mailers high when filled with typical lightweight products (under 2 lbs). For heavier or fragile contents, reduce stack height to 3-4 layers to maintain protection integrity.
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.