Our 7 year old managed to get my 3.5 year old twins excited about this show. They decided to be Ladybug and Cat Noir on Halloween. They are 3.5 years old but wear size 4T-5T. I ordered a small one and hoped for the best. It suits her really well! She likes the suit and the cat ears. The little bell is a nice touch. I deducted 1 star because she immediately started asking for a Cat Noir ring which I realized was not there. The ladybug costume I ordered for another twin included her earrings so I think it would make sense to include a ring for Chat Noir. We'll find another replacement ring for her, but it would be nice if it were included as it's a very important part of Chat Noir's outfit!