If I go to a shop I can try something on to see if it fits. If I buy something from a shop online I can buy a size up or down to find out what fits best and can return what doesn't fit. But if I buy something from Vinted or Ebay I want to know the measurements, underarm to underarm and neck to waist/hem. It's all well and good saying it's a 12 or 14 or 16 or a Medium or Large, but that doesn't really mean anything. So if I am interested in buying something I always message the seller asking for the measurements. So few sellers respond. I know this isn't AIBU but am I? Clothes sizes vary so much and I just want to know if something is likely to fit before I buy, especially when most don't accept returns.