Black suede Birkenstock Bostons with tan interior EU size is 41 which equates to a 10-10.5 on the size chart, but these are the Medium/Narrow width so feel like they run a lot smaller to me. Size note: I'm a size 9 and they aren't too big on me. I have another pair of Bostons in a size 40 regular/wide that feel bigger. IMO these fit like a 9 narrow Only ever worn inside with socks so minimal wear on the soles. Some marks on the foot beds/color variation that always seems to happen with Birks, but no major patina. Some small scuffs on the suede but nothing very notable.