7x5x3 Corrugated Mailers - ECT-32 Kraft Crush Resistant, 50-Pack
$51.74
/ bundle of 50$1.03 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
7" × 5" × 3"
Board / material
ECT-32 Single Wall Corrugated
Color
Kraft
Freight class
Class 125
Specifications
| Inside dimensions | 7" × 5" × 3" (L × W × H) |
|---|---|
| Board / material | ECT-32 Single Wall Corrugated |
| Color | Kraft |
| Sold as | Bundle of 50 |
| Order in multiples of | 50 |
| Bundle weight | 9.74 lb |
| Outer carton (shipping) | 20.0 × 18.0 × 6.0 in |
| LTL freight class | Class 125 |
| GTIN | 848109055534 |
| SKU | M753K |
About this item
SKU M753K — 7" × 5" × 3", ECT-32 Single Wall Corrugated, Kraft. Sold as a bundle of 50, shipped from US warehouses.
The 7x5x3 ECT-32 Kraft Corrugated Mailers - One-Piece Fold Design is a corrugated mailer for books, catalogs, apparel, subscription kits, samples, documents, and small e-commerce orders. Listed specs include inside dimensions 7" x 5" x 3"; kraft material; ECT-32; 50/Bundle. 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 is ECT-32 and why does it matter for my shipping operation?
ECT (Edge Crush Test) 32 indicates the corrugated substrate can withstand 32 lbs of pressure per linear inch, ideal for small parcels under 5 lbs. This rating ensures crush-resistant performance during stacking in warehouses and on freight vehicles, protecting product integrity while keeping material costs lower than heavier ECT-40 alternatives.
How much labor time do I save with the fold-and-tuck design?
Assembly takes approximately 3-5 seconds per mailer with zero adhesive, tape, or stapling required. For a team packing 500+ units daily, this design saves 40+ labor hours monthly compared to traditional taped boxes, translating to direct cost savings and faster order throughput.
Can I stack these mailers flat for storage, and how much space do I save?
Yes. Flat-shipped bundles of 50 stack compactly and occupy 85-90% less warehouse space than pre-assembled boxes of equivalent capacity. A single pallet can hold 100+ bundles, enabling better inventory turnover and reducing storage overhead for mid-sized fulfillment operations.
Are these mailers suitable for automated packing lines?
These mailers are optimized for manual and semi-automated picking operations. The fold-and-tuck design is operator-friendly and requires minimal training. For fully automated lines, we recommend consulting our packaging engineering team to assess compatibility with your specific equipment.
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.