The tag says 4-6 months, but my child wore this until they were about 80cm tall. It can be worn even in mid-winter and is made of cotton knit, so it's a material that doesn't get too hot. Mustard-colored knit sweater with a buttoned shoulder design for easy on and off. - Brand: H&M - Size: 68 (4-6M) - Color: Mustard - Design: Buttoned shoulder design - Material: Knit Thank you for looking.