6x3x3 ECT-32 Kraft Corrugated Mailers 50-Pack
$32.66
/ bundle of 50$0.65 per mailer
Request bulk pricing
| Quantity (bundle) | Item-subtotal discount |
|---|---|
| 1–2 | Base item price |
| 3–5 | 3% off qualifying item subtotal |
| 6+ | 5% off qualifying item subtotal |
In stock · ships within 1 business day from the nearest of 5 US warehouses (IL, PA, TX, GA, CA) · 1–5 business days in transit · freight calculated at checkout · free ground shipping on orders over $99 (parcel rates up to $29.95) and over $500 (up to $120)
30-day returns on stock items · Return policy
Inside dimensions
6" × 3" × 3"
Board / material
ECT-32-B Corrugated
Color
Kraft
Freight class
Class 125
Specifications
| Inside dimensions | 6" × 3" × 3" (L × W × H) |
|---|---|
| Board / material | ECT-32-B Corrugated |
| Color | Kraft |
| Sold as | Bundle of 50 |
| Physical units per order increment | 50 (one bundle) |
| Bundle weight | 6.28 lb |
| Outer carton (shipping) | 16.0 × 12.75 × 5.75 in |
| LTL freight class | Class 125 |
| GTIN | 848109037585 |
| SKU | M633K |
About this item
SKU M633K — 6" × 3" × 3", ECT-32-B Corrugated, Kraft. Sold as a bundle of 50, shipped from US warehouses.
The 6x3x3 Kraft Corrugated Mailers ECT-32 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 6" x 3" x 3"; kraft 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 ECT rating means and why ECT-32-B matters for my operation?
ECT (Edge Crush Test) 32-B indicates your mailer withstands 32 lbf/in of crushing force, ideal for small parcels. This rating balances protection for fragile items with lightweight postage efficiency. For heavier items over 5 lbs, consider ECT-44 alternatives.
How much warehouse space and shipping cost can I save versus rigid boxes?
Flat-shipped mailers consume 75-85% less storage space than pre-assembled boxes and weigh 30-40% less, directly reducing dimensional weight charges on parcel carriers like UPS/FedEx. A case of 50 mailers occupies roughly 1 cubic foot versus 8+ cubic feet for rigid equivalents.
Do these mailers require tape, glue, or special equipment to assemble?
No. These one-piece fold-and-tuck mailers require zero assembly materials. Simply fold the flaps together in seconds and seal with a standard packing tape if needed. Assembly takes under 15 seconds per unit, reducing fulfillment labor by 40-50% versus traditional boxes.
Are these mailers suitable for fragile items like glassware or electronics?
Yes. The double-wall construction on front and sides provides crush resistance rated for ECT-32-B. For extremely fragile items, we recommend adding 2-3" of interior cushioning (foam, air pillows, or kraft paper). The 6x3x3" size works perfectly for individually wrapped items.
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.