I figured a women's extended would be between a mens (9-15 seems to be all available in mens lately) and a womens regular length.  These are as long as or longer than a men's regular sock.  Luckily they have those "arch supports" stretchy part to keep the sock from sliding out your heel.

The ankles are very tight.  I have extremeley skinny ankles for my size, but these were painful after a day. They have since stretched some, so they are fine.

they have different colored logos on each pair.  if you have ocd, this may drive you insane. I just mix and match.

I would call these "medium" thickness crew socks.  Cushion on bottom, but slim on top, so fits an average shoe.