i don't think it's a matter of height; it's size in general. bigger girls usually have better body control because they've learned to control their muscles and usually have more muscle then all skin and bones girls! i'm 5'5 and yesss pretty tall for a top but it's not like i'm big. bases can't just always hope for a little girl anymore! my best friend is 5 foot and tops and we weigh within 3 pounds of each other... sooo it's really not a height issue. we both have beautiful flexibility sooo bases and backs need to man up :) plus it looks a lot more impressive when your tops aren't half your size!