Determining the ideal height for your raised toilet seat helps you ensure a comfortable posture for sitting and rising. First, measure the distance from the floor to just above the back of the knee. Next, measure the toilet seat's current height from the floor upwards. Subtract the second figure from the first to arrive at the ideal height for your raised toilet seat.
Raised toilet seats typically come in three standard sizes of 2, 4 and 6 inches. After finding the best height for your seat, you'll need to select a style. A regular raised seat gives just a bit of elevation for support when sitting or standing. Padded seats and arms offer extra comfort for those with arthritis or who are prone to pressure sores.