agnès b. ENFANT Long-sleeved T-shirt Bordered Charcoal gray / Bordeaux 100% Cotton 1 year old (approx. 70-80cm) I think it can be worn anytime except in mid-summer. Unused, but pre-washed. Almost new. After purchasing and washing, I tried to put it on, but it wouldn't fit over my child's head. My child's head circumference is small, but she's almost 2 years old...(^^;; I think a 1-year-old or a child with a very small head before that age would be able to wear it normally. ☺︎