12x3x3 Shipping Boxes — ECT-32 Kraft Corrugated, 25-Pack
$21.80
/ bundle of 25$0.87 per box
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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
12" × 3" × 3"
Board / material
ECT-32 Single Wall Corrugated
Color
Kraft
Freight class
Class 125
Specifications
| Inside dimensions | 12" × 3" × 3" (L × W × H) |
|---|---|
| Board / material | ECT-32 Single Wall Corrugated |
| Color | Kraft |
| Sold as | Bundle of 25 |
| Order in multiples of | 25 |
| Bundle weight | 3.76 lb |
| Outer carton (shipping) | 15.5 × 8.0 × 6.75 in |
| LTL freight class | Class 125 |
| GTIN | 848109006314 |
| SKU | 1233 |
About this item
SKU 1233 — 12" × 3" × 3", ECT-32 Single Wall Corrugated, Kraft. Sold as a bundle of 25, shipped from US warehouses.
The 12" x 3" x 3" ECT-32 kraft shallow corrugated shipping box is for books, binders, framed prints, catalogs, folded apparel, and other low-profile items. Listed dimensions are 12" x 3" x 3"; board and format details include ECT-32, single wall; sold in a bundle of 25; listed weight 3.76 lb. For fit checks, use the 12" x 3" x 3" inside dimensions for flat goods that need less empty depth than a taller shipping box.
Ideal for shipping documents, framed art, signage, flat goods, and large prints. A sturdy, reliable choice for small-business, Etsy, and ecommerce shippers.
Flat shipping boxes: Good fit for shipping documents, framed prints, signage, flat goods, apparel layers, and large paper products. These corrugated boxes help small businesses, ecommerce teams, and warehouse shippers match products to the right box size for everyday fulfillment.
Common questions
What does ECT-32 mean and why does it matter?
ECT (Edgewise Crush Test) rating of 32 means each box can handle 32 pounds of pressure per linear inch. This single-wall construction provides cost-effective protection for lightweight to mid-weight items while maintaining durability during stacking and transit.
How does the long-side opening improve packing efficiency?
The lengthwise opening runs the full 12" dimension, allowing items to be inserted end-first without forcing them through narrow top openings. This reduces packing time by 30-40% compared to traditional top-opening boxes and cuts product damage from insertion friction.
Can these boxes be stacked safely in a warehouse?
Yes. ECT-32 kraft corrugated supports reliable stacking up to 4-5 boxes high when loaded to typical capacity (5-8 lbs per box). Stack height depends on item weight, storage duration, and humidity conditions; always verify final load configuration with your operations team.
Are these boxes eco-friendly?
Absolutely. Made from 100% recyclable kraft corrugated, these boxes meet most commercial recycling programs. The single-wall construction also reduces material weight, lowering freight emissions and costs compared to double-wall alternatives for lighter shipments.
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.