Christies Home Living Adjustable PU Leather Office Chair, Black Back support : All day comfort seat and back ,back height 20.7 inch 360 Swivel : Smooth-rolling, seat-height adjustable, black PU leather Adjustable seat : Seat length 18.5 Inch , seat depth 18.3 Inch , seat height 18 inch to 22 inch , arm height 25 inch to 29 inch 240-pound maximum weight 27 by 25 by 36.8 to 40.5 inches