I love Fitflops---I have 3 pair of the sandals, and now these boots.  Previous reviews tell you to order a size up because they run small---I did, and they don't.  I find they run true to size, and they are a bit large for me, as a result.  If you're a half size, order down, not up, unless you have a wide foot.  These are like Uggs, they will stretch with wear and form to your foot.  If they're too big and slop around, they will never be able to do that.