The length of a standard wheelchair from the back of the rear wheels to the front of the footrests is 42 inches. The width of a wheelchair, including wheels, is typically 26 inches. The distance from the floor to a wheelchair's handles is 36 inches.
For a wheelchair to properly fit an individual, the height of the seat should be the distance from the user's heels to the bend in the knees, plus 2 inches. In most adults, this measurement is 19.5 to 20.5 inches. Additionally, the seat width should be the measurement of the widest point of the user's lower body, plus 2 inches. This allows additional space for clothing and medical devices.