Hon Stack Shell Chairs, w/ Arms, 20-7/8"x22"x33", Lava Olson Stacker Chairs with arms offer sturdy polymer seats and backs, chrome-plated steel rod frames. Chairs stack easily. Convenient grip in back makes them easy to transport. Chair features a wallsaver back design and designed-in lumbar support. Seat size is 18" wide x 18" deep. Seat-to-floor measurement is 17-1/2" high. Back is 20" wide. The 7/16" steel wire frame has chrome finish. The seat and back are made from 1/8" thick textured polypropylene. Chairs meet or exceed applicable ANSI/BIFMA standards.