The dimensions of 17.5" wide x 15 3/8"deep refer to the right and left cabinets that are behind the glass doors. These cabinets are also approximately 22" in height. The two shelves in each of them are also adjustable. The center cabinet above the drawer is 17.5" wide, 15 3/8 deep, and 14" high. The drawer beneath is similarly 17.5" high and 15 3/8" deep, as well as 6 inches high.