PrimeCables Ergo Adjustable Sit-Stand Desk Converter with removable keyboard tray: 80 cm (32”) deep with keyboard tray attached, but fits on a 60 cm desk surface. 90 cm (35½”) wide, 17 cm (6½”) high in lowered position, 52 cm (20”) high in raised position. This is a heavy, large surface suitable for a big monitor or even a tower computer. I bought this sit-stand desk so that I could fit a 2-octave midi controller on the keyboard tray (which is way bigger than a normal keyboard) so it will easily hold a standard external keyboard with lots of room for a mouse pad. $60 o.b.o.