I got these in a size 12 for my husband for Christmas (his usual size).  I also got our son a pair in a size 13.  Unfortunately, my husbands did not fit him.  They were just way too small to be comfortable even without socks!  I had him try on the size 13 and they fit perfectly.  Then I found out our son's girlfriend got him a lovely pair of Ugg slippers so I sent back the size 12.
My husband is very happy.  He loves his cozy slippers.  He says they are perfect.  I have bought him Uggs in the past but I have to say, dollar for dollar, Bearpaw is a much better buy and their slippers and boots are excellent.  I would not hesitate to buy them again.