I normally wear a size 14 shoe and I only saw the Biarritz going up to the equivalent of a US men's size 13 but read that they run a bit large, so I took a chance and ordered.  This is a beautiful loafer and has the comfortable sole I expected from an ECCO shoe; however, they had a very tight and almost painful fit for a solid week and a half.  After enduring the brief discomfort they now feel as great on my feet as my larger ECCOs and I'm glad I gave them a chance.