This is a Petit Bateau knit, a classic every year. The size is 12 months. The feel and design are quintessential Petit Bateau. In terms of size, I think it would fit a baby from around 6 months to 1.5 years old. It's easy to match with any outfit. I bought it at a department store for around 10,000 yen. This is a used item, so please purchase only if you understand this. Price negotiations are also welcome.