Mid-back chair offers breathable mesh on the back and seat that conform to your body for better comfort. Seat adjusts from 19-1/10" to 22-7/11" in height and from 18-1/0" to 20-1/10" in depth to get just the right position for optimum working conditions. Back tilt adjusts in three stages. Arms adjust from 10-3/4" to 13-9/10". Design also includes a 25-3/5" diameter five-star nylon base, black plastic frame and 60mm dual-wheel casters for easy chair movement. Weight capacity is 250 lb. Seat measures 18-1/10" x 18-9/10". Back size is 18-1/9" x 17-1/3".