18x18x16 Boxes
Updated August 1, 2026
Prices are live catalog prices.
18x18x16" corrugated boxes in stock — exact inside dimensions, grade stamped on every listing, bundle quantities with per-box pricing shown, shipped from 5 US regional warehouses.
| Product | Price (per bundle) | Per box |
|---|---|---|
| 18x18x16 ECT-48 Double Wall Kraft Boxes - Bundle of 10 | $72.73 / 10 | $7.27 |
| 18x18x16 Shipping Boxes — ECT-32 Kraft Corrugated, 20-Pack | $56.67 / 20 | $2.83 |
| 18x18x16 Kraft ECT-32 Deluxe Moving Boxes - 20 Pack | $79.51 / 20 | $3.98 |
Sizing note: dimensions are inside measurements (L x W x H); your item should clear each by about 1/4". Nearby sizes: small · medium · large · size chart.
Frequently asked questions
Are 18x18x16 dimensions inside or outside?
Inside. The usable interior is 18x18x16"; outside runs roughly 1/8–1/4" larger per wall by grade.
Do 18x18x16 boxes ship flat?
Yes — corrugated boxes ship flat in bundles and fold to shape. Bundle counts and per-box pricing are on each product page; freight is quoted live at checkout.