PU Leather Hydraulic Lift Adjustable Height Swivel Office Desk Chair White (1013-5) Features: 1) Swivel Seat turns around, 2) Hydraulic Lift that goes up and down 3) Rolling Chrome Base that will allow you to move chair around easily, 4) Tilt so you can lean back and relax. Seat Height: 15" - 22", Back Seat Height: , Seat Width :20.5", Seat Depth: 18.5". This seat will be enjoyed by petitte adults. UPDATED VERSION: customers have told us in the past that the regular wheels do not work well on hard (wood) floors and so we upgraded the wheels to higher quality rubber/plastic so that they will work smoothly on hard (wood) and soft (carpet) floors.