Seat measures 18-1/2"W. x 16-1/2"D. x 3" thick contoured. Backrest measures 14-1/2"W. x 9-1/2"H. with lumbar support and protective rear panel. Black frame finish. FOB Delivered.GUARANTEES Biofit seating products are warranted against mechanical or structural failure due to defective material, workmanship or abnormal wear for 13 years of normal use. Pneumatic cylinders are covered for the functional lifetime of the chair or stool.