Our 28" x 12" x 12" 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 28 x 12 x 12 shipping boxes are made from 200 Pound test, kraft C-flute single wall corrugated carton. Our standard boxes are designed for shipping or storing wide or medium-size specialty items.