Babaa jumper no18 sweater toddler 2 light blue

I bought this for my son to wear around the holidays. He wore it twice: accompanying me to vote and on Xmas day! I bought it basically NWOT from a second owner. It came to me in like-unworn condition. See measurements, because IMO this seems to fit small. My son is very tall so my thinking may be skewed, it it fit him just perfectly at about 13-15 months.