Pitstop Furniture GP1000B GT Office Chair, Black Seat height adjustable from 18-1/2 to 22 inches; three armrest settings: 11, 12-1/2, and 13-1/2 inches Chair dimensions: 23-1/2 inches wide x 24-1/2 inches deep x 51 inches high Comfort seat area is 15 inches wide x 17 inches deep Back seat area is 12-1/2 inches wide x 19 inches high Chair has a brake caliper kit with racing suspension spring