18x18x24 vs 20x20x24 Boxes

Not sure which to pick? Use the Packaging Tools to get a recommendation.

Choose 18x18x24 when your product fits the 18x18x24 interior with room for dunnage. Choose 20x20x24 when you need more interior space at 20x20x24 or a different aspect ratio.

18x18x24 options

• 24x18x18 ECT-32 Kraft Corrugated Boxes - Bundle of 10
  $31.97In stock
• 18x18x24 ECT-32 Kraft Corrugated Boxes - Bundle of 15
  $43.39In stock
• 24x18x18 ECT-32 Kraft Moving Boxes - Deluxe Flap Design, Bundle of 10
  $45.85In stock
• 24x18x18 Multi-Depth Corrugated Box ECT-32 Kraft - Bundle of 15
  $53.22In stock
• 18x18x24 ECT-48 Double Wall Kraft Boxes - Heavy Duty Shipping Cartons, Bundle of 10
  $53.70In stock
• 18x18x24 ECT-32 Kraft Moving Boxes with Flap Tabs - Bundle of 15
  $58.82In stock

20x20x24 options

• 24x20x20 ECT-32 Kraft Corrugated Boxes - Durable Shipping, Bundle of 10
  $37.78In stock
• 20x20x24" ECT-32 Kraft Corrugated Boxes - Bundle of 10
  $38.55In stock
• 24x20x20 ECT-48 Double Wall Corrugated Boxes - Heavy-Duty Shipping, Bundle of 10
  $63.08In stock
• 20x20x24 ECT-48 Double Wall Kraft Boxes - Heavy Duty Shipping, Bundle of 10
  $104.96In stock

When to use

• Deciding between 18x18x24 and 20x20x24 for a new SKU or packaging refresh.
• Cost, protection, and throughput tradeoffs.

When not to use

• Edge cases where neither option fits — check the related guides.

Frequently asked