This is a Petit Bateau gigoteuse (sleeping bag) for 18-36 months. I believe this size is not sold in Japan. My child wore it from 8 months to 1.5 years old. It was warm and fluffy, and my child loved wearing it. Since the feet are covered, it's difficult to roll over, so it's convenient for preventing them from sleeping on their stomach. Please check the condition in the photos. Length: Approximately 80 cm Width (around the chest): Approximately 64 cm Thank you for looking.