Fits most toilets; remains securely in place. The armrests flip up, and can be easily removed without tools. The seat can be snapped off for cleaning. Choose from seats in two different heights. Another option is an angled model which simplifies use for those with impaired hip or knee mobility. The angled seat is 4" in back and 2" in front. 23-1/2"W x 18"D width between armrests 19", height of armrests above seat 9". Weight capacity 286 lbs.