18x18x28 Boxes
18x18x28 Boxes
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Parent category: Corrugated Boxes Buying Guide
18x18x28 boxes are 9,072 cubic inches of space — a standard corrugated shipping size for ecommerce orders, apparel, and mid-weight product kits.
Quick facts
| In-stock SKUs | 3 |
|---|---|
| Total options | 3 |
| Price from | $33.26 |
| Price to | $92.79 |
| Average price | $55.28 |
| Materials | kraft, corrugated |
| Strengths | ECT-32, ECT-48 |
| Pack quantities | 10 |
In-stock options
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28x18x18 ECT-32 Kraft Corrugated Boxes - Heavy-Duty Shipping, Bundle of 10
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18x18x28 ECT-32 Kraft Corrugated Boxes - Standard Strength Shipping, Bundle of 10
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28x18x18 ECT-48 Double Wall Kraft Boxes - Heavy-Duty Shipping, Bundle of 10
When to use
- Shipping rigid goods that fit 18x18x28 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 18x18x28 — 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 18x18x28 box used for?
18x18x28 boxes are 9,072 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 18x18x28 box?
A 18x18x28 box has 9,072 cubic inches of interior space. At the FedEx/UPS Ground domestic divisor of 139, the dimensional weight rounds up to about 66 lb (65.27 lb before rounding). Carriers charge for the greater of actual weight or DIM weight, so this is the minimum billable weight for a 18x18x28 carton even if it's lightweight.
What ECT strength ratings are 18x18x28 boxes available in?
Packrift stocks 18x18x28 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. 3 in-stock SKUs are available across these grades.
What case-pack sizes do 18x18x28 boxes come in?
Packrift sells 18x18x28 boxes in case packs of 10 per case. Bulk pricing improves with larger case quantities — see each product page for the exact case size.
What box sizes are similar to 18x18x28?
Buyers comparing 18x18x28 boxes also consider 18x18x30, 20x20x26, 20x20x30, and 18x18x24 boxes. See related sizes below or use the box size calculator to find the closest fit for your product dimensions.