Our 20 x 20 x 12-10-8-6 Multi-Depth boxes offer the benefits of having many box sizes in your inventory to suit your various packaging needs and save warehouse space. Box sides are scored to multiple depths to allow height adjustment for a perfect fit. Our 20'' x 20'' Multi-Depth style boxes adjust to the heights of 12", 10", 8", and 6". These 20" x 20" shipping boxes meet requirements for 200#-C/ECT-32-C corrugated. Great for shipping or storing large size items.