I purchased this children's dress online. It's a tight-fitting one-piece dress! It's labeled as a size 100 (3-4 years), but it's quite small and I couldn't wear it even once. In my opinion, it would probably fit a 2-year-old perfectly as a long dress! It's tight-fitting and stretches quite a bit, so depending on the child, it might even fit a 2.5-year-old! The material isn't scratchy, so it can be worn in the summer♪