Chanel Camelia slippers - Help please!!

Hiii
thanks for your replies!!!

my cousin is organising this for me so i have absolutely no idea where they're coming from... hence also why i asked abt the sizing... cuz i wont get to try it on at all :sad:
i think she said from europe... armesterdan?

so is it safer to go for a 38? i vaguely remember hearing from someone that said they are a little narrower than normal ??