A gift to a man that wears a size 10, so I ordered a size 11 (in case of socks).  It was very tight with bare feet.  I went ahead and sent them back and exchanged for a size 12...STILL TOO TIGHT...Just be aware they run small.  I gave up after that and returned them as well.  However, as usual, Amazon's service is impeccable when it comes to returns and refunds