This is a romper-style baby dress. The size is 80. It was worn for a half-birthday. It was a little big at the half-birthday. I think a one-year-old can also wear it. There are some fold wrinkles. The fabric is thin, so it can be worn in the summer, and in the winter, I think it can be worn with an inner layer. It's very cute, so I recommend it ♡