Regency Seating Aspire Office Ergonomic Swivel Chair with High Back Adjustable lumbar cushion raises and lowers to fit each user perfectly Padded headrest Two-toned armrests and five-point base Chair funcions include: 360 degree swivel, pneumatic seat height, center tilt, tilt tension, tilt lock and arm height adjustments Seat Height: 18-inches to 21-inches from floor, Seat Dimensions: 20-inches wide x 20-inches deep