6x12x18 Boxes
6x12x18 Boxes
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Parent category: Corrugated Boxes Buying Guide
6x12x18 boxes are 1,296 cubic inches of space — a standard corrugated shipping size for ecommerce orders, apparel, and mid-weight product kits.
Quick facts
| In-stock SKUs | 4 |
|---|---|
| Total options | 4 |
| Price from | $29.43 |
| Price to | $49.98 |
| Average price | $38.30 |
| Materials | kraft, corrugated, white |
| Strengths | ECT-32, ECT-48 |
| Pack quantities | 15, 25 |
In-stock options
-
18x12x6 ECT-32 Kraft Corrugated Boxes - 25 Bundle
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18x12x6" Multi-Depth Corrugated Boxes ECT-32 Kraft - 25 Bundle
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18x12x6 ECT-48 Double Wall Boxes - Heavy-Duty Kraft Cartons, Bundle of 15
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18x12x6 ECT-32 White Corrugated Boxes - 25 Pack Bundle
When to use
- Shipping rigid goods that fit 6x12x18 inches (L x W x H).
- Orders where dimensional weight matters — this size avoids wasted cube.
- Bulk case packs for 3PLs, Amazon FBM, and DTC fulfillment lines.
When not to use
- Goods significantly smaller than 6x12x18 — you pay for wasted void.
- Items over 50 lb — step up to ECT-44 or ECT-48 double-wall.
Related
Frequently asked
What is a 6x12x18 box used for?
6x12x18 boxes are 1,296 cubic inches of space — a standard corrugated shipping size for ecommerce orders, apparel, and mid-weight product kits.
What's the dimensional weight (DIM weight) of a 6x12x18 box?
A 6x12x18 box has 1,296 cubic inches of interior space. At the FedEx/UPS Ground domestic divisor of 139, the dimensional weight rounds up to about 10 lb (9.32 lb before rounding). Carriers charge for the greater of actual weight or DIM weight, so this is the minimum billable weight for a 6x12x18 carton even if it's lightweight.
What ECT strength ratings are 6x12x18 boxes available in?
Packrift stocks 6x12x18 boxes in ECT-32 and ECT-48 strength ratings. ECT-32 is the standard for most ecommerce shipments under ~50 lb; ECT-44 and higher are for heavier loads, double-stacked pallets, or freight shipping. 4 in-stock SKUs are available across these grades.
What case-pack sizes do 6x12x18 boxes come in?
Packrift sells 6x12x18 boxes in case packs of 15 and 25 per case. Bulk pricing improves with larger case quantities — see each product page for the exact case size.
What box sizes are similar to 6x12x18?
Buyers comparing 6x12x18 boxes also consider 6x11.25x17.25, 6x12x16, 8x12x18, and 8x11.25x17.25 boxes. See related sizes below or use the box size calculator to find the closest fit for your product dimensions.