I am an 11-year-old girl and ordered size S. I really liked everything, it's high quality, but I warn you, it has a very strong smell. Also, it's a bit big for my height of 147cm, another downside. I only ordered belts, but I also received a skirt, even though I didn't order it, and it came in size L. 😅 but otherwise I really like everything, I am very satisfied.
(gave the skirt to my older sister)