Width (footprint)at lowest height - 46cm / 18" Width (footprint)at highest height - 49.5cm / 19.5" Depth - (footprint)at lowest height - 40.5cm / 16" Depth - (footprint)at highest height - 46cm / 18" Height to top of backrest from seat - 32cm /12.5" Min Seat Height at centre point - 35.5cm / 14" Max Seat Height at centre point- 51cm / 20" Seat Width - 51cm / 20" Seat Depth - 30.5cm / 12" Weight -