20x20x20 vs 18x18x18 Boxes
20x20x20 and 18x18x18 are close in size, so the right pick comes down to what you ship. The 20x20x20 gives about 76 sq in more usable face (400 vs 324 sq in), so it suits thicker or bundled items; the 18x18x18 ships the same item for less postage when it fits. Packrift stocks both: 6 and 6 SKUs are live below.
20x20x20 vs 18x18x18 Boxes at a glance
| 20x20x20 | 18x18x18 | |
|---|---|---|
| Interior size | 20x20x20 in | 18x18x18 in |
| Best for | larger / bundled items | snug fit, lowest postage |
| Mil options in stock | not listed | not listed |
| Price range | $20.91-$37.15 | $26.44-$41.65 |
| In-stock SKUs | 6 | 6 |
20x20x20 Boxes
| SKU | Product | Dimensions | Spec | Pack | Price | Availability |
|---|---|---|---|---|---|---|
| 20204 | 20x20x4" ECT-32 Kraft Corrugated Boxes - Shallow Depth Shipping, Bundle of 10 | 20 x 20 x 4 | kraft corrugated | 10 | 20.91 | In stock |
| 202015RP6 | 20x20x15 Corrugated Boxes - 6 Pack Retail Bundle | 20 x 20 x 15 | corrugated | 6 | 24.54 | In stock |
| 202020 | 20x20x20 ECT-32 Kraft Corrugated Cube Box - Bundle of 10 | 20 x 20 x 20 | kraft corrugated | 10 | 31.07 | In stock |
| 20206 | 20x20x6" ECT-32 Kraft Corrugated Boxes - Shallow Depth, Bundle of 15 | 20 x 20 x 6 | kraft corrugated | 15 | 32.42 | In stock |
| 202018 | 20x20x18 ECT-32 Kraft Corrugated Boxes - Heavy-Duty Shipping, Bundle of 10 | 20 x 20 x 18 | kraft corrugated | 10 | 32.57 | In stock |
| 202012 | 20x20x12 ECT-32 Kraft Corrugated Boxes - Bundle of 15 | 20 x 20 x 12 | kraft corrugated | 15 | 37.15 | In stock |
18x18x18 Boxes
| SKU | Product | Dimensions | Spec | Pack | Price | Availability |
|---|---|---|---|---|---|---|
| 181824DPBRP6 | 18x18x24 ECT-32 Corrugated Boxes - 6 Pack Bulk Shipping Cartons | 18 x 18 x 24 | corrugated | 6 | 26.44 | In stock |
| 18186 | 18x18x6 ECT-32 Kraft Corrugated Boxes - Shallow Depth, Bundle of 20 | 18 x 18 x 6 | kraft corrugated | 20 | 34.89 | In stock |
| HD181812DW | 18x18x12 ECT-48 Double Wall Kraft Boxes - Heavy Duty Shipping Cartons (Bundle of 10) | 18 x 18 x 12 | kraft | 10 | 36.98 | In stock |
| MD18186 | 18x18x6" Multi-Depth Corrugated Boxes ECT-32 Kraft - Adjustable (20-Pack) | 18 x 18 x 6 | kraft corrugated | 20 | 39.76 | In stock |
| 181828 | 18x18x28 ECT-32 Kraft Corrugated Boxes - Standard Strength Shipping, Bundle of 10 | 18 x 18 x 28 | kraft corrugated | 10 | 39.78 | In stock |
| 181812 | 18x18x12 ECT-32 Kraft Corrugated Boxes - Bundle of 20 | 18 x 18 x 12 | kraft corrugated | 20 | 41.65 | In stock |
How to choose
- Measure your item and add room for fold, padding, or label.
- If both fit, the smaller/thinner option ships cheaper; size or gauge up for thick, heavy, or sharp contents.
- Use the bulk quote path for recurring or mixed-SKU orders.
FAQ
- Should I choose 20x20x20 or 18x18x18 Boxes?
- Pick the smallest size / lightest gauge your item fits without forcing the seal. Both are stocked above with live pricing.
- What should I do when a field is not listed?
- Do not infer it. Open the PDP or use the bulk quote path so the order is checked against current catalog data.
Already know the SKU you need? Reorder by SKU.