IKEA BILLY Height Extension Unit Birch Effect 16x11x14" 904.959.16
To be combined with BILLY bookcase 15¾x79½" for added storage vertically. Safety strap for mounting to wall included. Depth: 11 " (28 cm). Width: 15 3/4 " (40 cm). Height: 13 5/8 " (35 cm).