5565 Features: -Air Grid Seat and Back with Built-in Lumbar Support.-Height Adjustable Angled Arms with Soft PU Pads.-Heavy Duty.-Arms max inside: 18.75".-Arms to floor min: 25.75".-Seat height min: 18.25".-Seat height max: 18.25". Dimensions: -Seat Dimensions: 20.25" W x 20.75" D x 1.25" T.-Back Dimensions: 20.5" W x 19" H x 1.25" T.-Max overall Dimensions: 37.25" H x 26.5" W x 27" D.