The 22×18″ ECT-32 Single Wall Corrugated Layer Pads is a corrugated shipping box for e-commerce orders, parts, samples, retail goods, returns, and warehouse shipments. Listed specs include inside dimensions 22″ x 18″; corrugated material; ECT-32, single-wall; bundle of 50. Use it as a shipping carton, mailing box, storage box, or e-commerce shipper when the item fits the listed dimensions.