I had a handmade artist make this for me♡ The size is listed as neck size... 30-35cm (up to around 3 years old, *may vary depending on the child). I bought this during my second daughter's baby days and each of them wore it a few times. Now that I have three children, I no longer have time to go out with付け襟 (tsuke-eri, detachable collars), so I'm selling it while it's still in good condition ( ;ω ; )