The Eurotech Apollo Multi-Function Mesh Back, Fabric Seat Office Chair is 36 x 26 x 20 (H x W x D inches). The seat is 20.5 x 19.3 (W x D inches). The back is 19.5 x 20 (W x H inches). The back can adjust up to 22.5 inches high. Includes the following features: Tension Control, Center Tilt, Tilt Lock, Back Angle Adjustment, Seat Height Adjustment, Waterfall Seat, Forward Seat Tilt, Back Height Adjustment, Width Adjustable Arms, Arm Height Adjustment, Seat Angle Adjustment.