Well.
I'm about 5 '9, and i way about 9 stone, yet im skinny.
I'm extremely toned, full 6 pac and muscles etc... but no fat underneath. So i guess that's why im aight at cross-country and long distance running etc...
So stamina wise, i'd probably say super fit. However, i've noticed a huge slide in my stamina lately, but i'd still class myself as being extremely in shape.