Size 1. I had it dry cleaned and stain-treated, but the stain on the hem couldn't be removed. I haven't had the size altered. For someone 152cm tall, it barely touched the shoes. Otherwise, I think there are no problems. Since it's the hem's folded-over part, altering the length might make it unnoticeable. It's not a dress that clings to the body's lines, so it's suitable for tall people. Even someone short like me, Size 1 is perfectly fine. I think so.