Lilly Pulitzer 💯% Silk Dress with Tie

Bought this from a runway show where it was worn by a model. It says size 10, but I'm an XS/S and it fits perfectly. I was told runway dress sizing is very different then normal sizing. EUC and many more special occasions in this dress! Open to offers! Tie loop on 1 side pulled...very thin string. I always just tied the belt around and you could never tell!