Returned for one whole size bigger and they are close to being to small-- length wise. Im also gonna get the blue one as well. They?ve held up for 1 year (see pics). I am a happy camper with my new products. As someone who owns multiple pairs of Birks, these sandals are absolutely up to expectations of real Birks! They feel much more well built, and fit and feel MUCH nicer than the $50 Peltors they compete with. The goal was good sound precision and bass response in a portable size. Very comfortable for my bf. The description here says CS540, yet two vendors have now sent me the CS540A which is the European version. It was well packaged and you even get a very good quality pair of spanners and Allen key for assembly.