I bought a medium adult size for my 11-year-old daughter who is 1.56 meters tall and weighs 52 kilograms. The shirt was tight and quite short (meaning you could see it and say that it is a child's size, not an adult's size like the costume was), and the shorts were a bit tight, but the problem was that when she sat down, the waistband was not strong enough, causing the shorts to slide down. The jacket fits well both closed and open. In terms of quality, it is good, it is what it appears to be.