I'm 6'5, so it's extremely rare to find a girl that tall...I've certainly never met a girl taller than me!
My current girl is 6'1, so when she wears heels she is around my height...and it looks/feels alright

Best thing about tall girls? The legs are bladdy incredible! (this is only a 13+ forum, so I won't elaborate...let's just say that my current girl's legs are 36inch inside!)