Feel the difference in comfort on this ergonomic office chair fusing style and function effortlessly. Healthy seating with curved lumbar to support the natural curve of your spine and a 2-to-1 recline ratio keep your feet relatively close to the floor. [_Our chair conforms to ANSI/BIFMA standard X5.1-17_] Modern executive office chair with curved back provides lumbar support Pivot headrest is height adjustable, padded arms pivot inward and outward 3 position locking 2-to-1 synchro-tilt - seat and back tilt in unison; pull lever outward to activate rocking motion, while tilt tension knob controls tilt resistance PRODUCT MEASUREMENTS: Overall Size: 28"W x 28-37.5"D x 45-51.75"H; Seat Size: 19.75"W x 18"D x 18.5-22.5"H; Back Size: 20.25"W x 29-31.5"H; Arm Size: 24.5-30.5"H from floor; 5.5-8"H from seat