Sit bone width

[emily_in_nc]

Standing method (if you have very long feet or flexible hip sockets, this may not work, most of us are proportional though)
1. Stand with your feet together.
2. Keeping your ankles together, point your toes away from your ankle (so your feet are in a V)
3. Align your ankles with your toes. Your heels should be about sits bone width apart.

Uhhhh, no. My sitbones are not 10" apart!

I have size 7 feet. I can turn my toes out a long way, though. And I never even did ballet!