The size is M, but it can also be worn by someone who usually wears L. I bought it at a Tokyo store for about 10,000 yen. This dress is popular with people of all ages. I was complimented so many times when I wore it, I can't even count how many people said it was cute! Haha. It's navy and can be worn casually or to the office. It's in beautiful condition as I haven't worn it many times, so please consider it.