Seven inches wide, and two of them come in the box - one for each side of a toilet or a washing machine, or a pair flanking a kitchen counter. Each has three tiers rated 18 lbs, and the sections detach so a tier can sit on a countertop instead of standing on wheels. PP throughout is waterproof, so a bathroom or a laundry room will not warp them. Each cart measures 21 x 7 x 27 in, with the pair weighing 6.5 lbs together. Black, with white also offered. Assembly is required.