5x3x3 Kraft Corrugated Mailers ECT-32-B Crush Resistant, 50-Pack
$28.22
/ bundle of 50$0.56 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
5" × 3" × 3"
Board / material
ECT-32-B Corrugated
Color
Kraft
Freight class
Class 125
Specifications
| Inside dimensions | 5" × 3" × 3" (L × W × H) |
|---|---|
| Board / material | ECT-32-B Corrugated |
| Color | Kraft |
| Sold as | Bundle of 50 |
| Order in multiples of | 50 |
| Bundle weight | 5.56 lb |
| Outer carton (shipping) | 16.0 × 11.75 × 6.0 in |
| LTL freight class | Class 125 |
| GTIN | 841436005289 |
| SKU | M533K |
About this item
SKU M533K — 5" × 3" × 3", ECT-32-B Corrugated, Kraft. Sold as a bundle of 50, shipped from US warehouses.
The 5x3x3 Kraft Corrugated Mailers ECT-32-B Crush Resistant, 50-Pack is a corrugated mailer for books, catalogs, apparel, subscription kits, samples, documents, and small e-commerce orders. Listed specs include inside dimensions 5" x 3" x 3"; kraft material; ECT-32-B; 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 mean, and how does it affect shipping performance?
ECT (Edge Crush Test) 32-B indicates the corrugated material withstands 32 pounds of force per linear inch before crushing. This mid-range strength is engineered for small parcel shipping and light-to-medium item protection, balancing durability with cost efficiency and keeping postage rates competitive.
How much assembly labor do these one-piece mailers actually save?
By eliminating tape, glue, and staples, workers assemble each mailer in 2-3 seconds versus 8-12 seconds for traditional boxes. At scale, a fulfillment center processing 500+ orders daily saves 40+ labor hours monthly while reducing material costs.
Can these mailers stack safely during storage and transit?
Yes. The double-wall corrugated construction and crush-resistant design support stacking heights of 4-5 mailers flat-packed, or stable stacking of assembled units during temporary staging before shipment. Always confirm weight distribution for your specific product load.
What's the freight advantage of flat-pack storage?
Flat-packed bundles reduce cubic footage by approximately 85% compared to pre-assembled boxes. This dramatically lowers warehousing costs and allows higher unit volumes per pallet, directly reducing per-box freight expenses and improving inventory turnover.
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.