Warehouse managers and fulfillment directors shipping small, lightweight items need reliable, cost-effective protection without assembly hassle. These 7 x 3 x 3" white corrugated mailers deliver ECT-32-B crush resistance in a one-piece design that folds in seconds, reducing labor time and postage costs per unit.

Best For
How to choose
Specs at a Glance
| Material | ECT-32-B White Corrugated |
| Dimensions | 7" L x 3" W x 3" H |
| Construction Type | One-Piece Fold-and-Tuck Design |
| Quantity Per Bundle | 50 Mailers |
| Recyclable | Yes |
Common Use Cases
- Small electronics and tech accessories shipping Fragile lightweight items and jewelry protection E-commerce subscription box fulfillment Sample and promotional product distribution Direct-to-consumer beauty and cosmetics packaging
What You'll Receive
- 50 x 7 x 3 x 3" white corrugated mailers Ready-to-fold one-piece design
Shipping & Packaging
Frequently Asked Questions
ECT (Edge Crush Test) 32-B indicates 32 lbs per inch of edge crush strength with B-flute corrugation. This rating provides reliable protection for lightweight items while maintaining cost efficiency, ideal for e-commerce and fulfillment operations prioritizing volume and speed.
One-piece fold-and-tuck construction eliminates taping, gluing, and stapling. Experienced fulfillment teams fold and seal each mailer in 2-3 seconds, reducing labor per unit by up to 40% compared to traditional four-flap boxes.
Yes. ECT-32-B corrugation provides double-wall crush resistance on front and sides. These mailers withstand typical sortation and palletizing pressures without compromising contents, making them suitable for multi-tier freight consolidation.
Absolutely. The compact 7 x 3 x 3" footprint and lightweight corrugated construction lower dimensional weight charges. Nested shipments maximize carton-per-pallet density, reducing cost-per-unit and your logistics spend at scale.
Technical Specifications
| Construction Type | One-Piece Fold-and-Tuck Design |
| Quantity Per Bundle | 50 Mailers |
| Recyclable | Yes |
| Color | White |
| Strength / Material | ECT-32-B Corrugated |
| Dimensions (Internal) | 7" × 3" × 3" (L × W × H) |
Shipping Information
Outer Carton Dimensions
7" × 3" × 3" (L × W × H)
Unit of Measure
BUNDLE
Qty Per Shipping Unit
50 PER BUNDLE
LTL Freight Class
Class 125
Delivery Method
Shown at checkout
Processing and delivery timelines vary by product, warehouse, order size, and destination. Freight-sensitive or oversized items may require LTL delivery or a custom quote before shipment.
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ORDER SUPPORT
Product Support
Specs, case quantities, and availability are listed on each product page. For bulk, mixed-SKU, or LTL freight orders, email support@packrift.com with the SKU, quantity, and delivery ZIP.
Use product support for fit, larger or recurring order, return, or order-issue questions. When price and Add to Cart are shown, checkout remains the direct ordering path.
Need a sample, fit check, or substitution review? Contact product support with the SKU, selected option, order quantity, and use case. Support will confirm the available path for that item.
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7x3x3 ECT-32-B White Corrugated Mailers - Crush Resistant, 50/Bundle
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