Velvet High-density foam cushioning offers superior comfort, covered with velvet fabric The seat has a 360-degree swivel and a pneumatic gas lift system Sturdy metal base coated with black color, complete with dual-wheel casters Dimensions: 20.5"W x 20.5"D x 29.5-33"H. Seat height: 20-23.6". Seat Depth: 20.5. Seat width: 20.5. Seat back: 19.7"W x 11"H. Base Diameter: 22" Some assembly required. Photo may be slightly different from the actual Item in terms of color due to the monitor's display