I read all the reviews about how these shoes run huge so I ordered size 11. I usually wear a 12 and the 11 fits but the shoes are *exactly* the length of my foot so if my foot moves forward (it's a 3 inch heel) my toes are off the front a little.  Some people said the shoes are wide, also, but mine aren't. I wear a B (medium) width.  The shoes are so cute and I've been wearing them around the house but I can't decide if they are too small so I just ordered them in a 12 and I'll keep the ones that fit better. I like Crocs but I always end up buying more than one pair in different sizes to figure out what fits. It varies with the style. I gave up on the "unisex" sizes.  They're just men's sizes and would only work for a woman who wears a wide width in women's shoes.

Update:  Now I get it.  There is a *huge* difference between the 12 and the 11. The problem is not so much the length as the width: why would they make the shoe wider as the size goes up???  I will keep the 11s and exchange the 12s for 11s in another color.  Love the shoes, though.  It's just hard to figure out what size I need in Crocs.