CALICO DESIGNS Neptune Computer Desk in Silver / Blue Glass 50350 Main Work Surface: 45.75 W x 25.25 D Monitor Shelf: 15.75" in Diameter 24"W x 10.5"D Adjustable Keyboard Shelf Middle Shelf: 21.25"W x 15.75"D, Bottom Shelf: 28.5"W x 18.5"D Tempered Safety Glass Top & Monitor Shelf, Top, Monitor Shelf and Keyboard Shelf rotate indenpendently around a central hub