Of course, it depends on the shape of your head. Our son has been wearing them since the age of 5

Hello Tobeeone We have been using these glasses for our daughter since she was 6 months old until she was 14 months old. I would measure the head width as this is stated in the specifications so you can check if the glasses fit. (width of glasses Narrow (up to 131 mm) our daughter has a rather small head and they fit perfectly. Greetings

It is classified as S3.

It is classified as S3.