Hovering over the choices gives an inch amount and hovering over Average I was shown 69in. That sounded fair enough for me, since I wanted to leave some room for height increasing events and items to reach my 74in ideal, but on the next page it claimed I had chosen 73 rather than 69. I was able to replicate this a few times with the second page not matching the height shown in the options on the previous screen. This does not seem to occur when inputting a custom amount.