Aviditi 18124 Flat Corrugated Box, 18" Length x 12" Width x 4" Height, Kraft (Bundle of 25) Flat corrugated box Manufactured from 200#/ECT-32 kraft corrugated The smaller depths on these cartons provide an ideal fit for shallow products Perfect for shipping apparel, books, picture frames, artwork, mirrors and clothing Measures 18-inches length by 12-inches width by 4-inches height