I absolutely love these boots! As other buyers have commented, they are true to size.  I hover between a size 10 and a 10 1/2, depending on the manufacturer.  I purchased the size 10 and they fit perfectly; there's even a bit of room for a nice warm pair of socks.  The toe box is square so your toes will not be squished in at all, even with heavy socks.  I like these boots so much I'm planning on purchasing them in brown as well.  I highly recommend buying these!!