Dimensions: 28.5L x 28.5W x 45.5 - 52H Seat dimensions: 19L x 19W Seat depth range: 18 - 20 Seat height: 18.5 - 21.5 Back dimensions (w/o headrest): 21W x 22H Back dimensions (with headrest): 21W x 28 - 31H Tilt range: 22° Armrest height: 11 - 14 Armrest height (from the floor): 26.7 - 32.2 Caster wheel diameter: 2.36 inches Number of caster wheels: 5 pieces Materials: Special German mesh (72% polyester, 28% polyamide) Colors: Cool Gray, Black Weight capacity: 300 lbs Item weight: 48.5 lbs Shipping dimensions: 29L x 27W x 19H x 67 lbs Assembly required: Yes Warranty: 2 years Free returns: 30 days The trial and return policy does NOT apply to products on sale. Adjustability: Headrest, armrest, back tilt angle and tension, seat tilt, seat depth and height. Assembling instructions: View here Functions guide: View here