Our 18.5" x 12.5" x 7" 200#/ECT-32 Standard-size corrugated boxes are designed to cater to all of your shipping and storage needs. The rigid cardboard construction protects contents and stacks securely. These 18 1/2 x 12 1/2 x 7 shipping boxes are made from 200 Pound test, kraft C-flute single wall corrugated carton. Our standard corrugated boxes are great for shipping or storing cylindrical, round or large-size items.