11-1/2" (w) x 21" (d) x 4-3/16 (h). Requires minimum 5" tall drawer opening. Includes pre-assembled 100lb full extension ball bearing drawer slides. Ships prepared (notched and bored) for USE undermount drawer slides (sold separately). Made from 1/2" prefinished solid white birch dovetailed drawer sides and 1/4" prefinished birch ply bottoms.