The right height for most toilets is 17–19 inches high, though regular toilets follow the standard height of 15 inches. A 17–19-inch height is thought to be good for the back and knees plus it’s an advantage to taller guys, the elderly and those with mobility issues. Factor in the kids and the “right height” may not be the best anymore. If possible, sit on the model you want to buy then decide if it suits you.