my daughter and I both wear a true 7 1/2 and and as many people have already stated crocs do not come in half sizes.  This can be a real pain. 7 are tight, 8 floppy. We bought the 7 and think that a couple hours in these shoes are ok but NOT all day. Lots of cushion, thicker than other femine crocs, could be good for raining or muddy area if the shoe fit.