4-3/8 x 4-3/8 x 3-1/2 White self-locking mailer box

DIMENSIONS: Inside dimensions measure 4-3/8-inches (length) x 4-3/8-inches (width) x 3-1/2-inches (height). TOP QUALITY: professional grade construction provides excellent protection. Boxes are easy to assemble, fold together in seconds and proudly made in the United States. MATERIAL & STRENGTH: These boxes are manufactured from 32 ECT, single wall, B-flute corrugated.