Let me start by saying I'm an experienced heel-wearer.  These are the most uncomfortable heels I've ever worn.  I could barely walk in them!  They fit, but the weird arch nearly killed me.  The strap is short, I had to use the last hole.  And at 5'3" and 105 lbs, I'd say my ankles are pretty average.  I ended up wearing them twice and gave them to Goodwill.  They look good, but are a total waste of money.