text: 10.5 US turns out to be 43 EU in most Ecco products. For years and years they're all I wear and I can trust to buy this size online.  Some of the toe designs (Dublin, Seattle apron, etc) I've found snug so I've not chanced those...you can see the design on these and the older 'chicago' style even look lengthier and it pays off in better comfort for me.