Friends of mine, a couple nearing age 80, are complaining that their toilet is too low and they now have trouble standing after using it. It does look low. I measured with seat up and the upper rim of the bowl is 14" above the floor. No manufacturers logo visible, the toilet is from 1968. My Toto at home looks higher but it is just 15" I found some "right height" American Standard that are 16.5" high. Recommendations?