I am 6'0" and my bench top is 44" above the floor. BUT- I use a think 2" think hard foam cushion to stand on. I rarely sit at my bench but do have a tall adjustable stool that is comfortable to sit on.
My workspace is very tight, and my handloading bench also serves as a gun smith bench so I set mine up to allow the presses to be moved. I did not want legs touching the floor to get in the way of storage. They say a picture is worth a thousand words... if you have questions about construction details just ask.
(Hmmmm- forum is not letting pics load... will try to add/edit later.)