New Birkenstocks - size 41 (10-10.5) - please read all details below; BUT one is regular width and the other is narrow. The retailer I purchased them from won’t allow a return and they are too long for me. There isn’t a huge difference between the shoes, but there is a difference - picture 3 shows them being worn. The regular width is fastened tighter. Photos 4-7 provide measurements of each shoe.