I bought these for my 2.5 year old son and they fit perfectly. The straps are so soft and just stretchy enough to fit great around his ears. (For reference, they are too small for my older son who is 6.5). Perfect for a toddler!!
I bought 4 of these masks for my 3 y/o son and they are precious. They fit him perfectly. He is excited to wear them because the prints are so fun! I love that they are organic.