This helmet fits my 4 year old very well as is. He loves to lift his face and make it shine. However, it only burns for a few seconds, so over and over again. I actually wear this myself for Halloween. But on my face without a little refinement, it doesn't fit. I put pads on my cheeks to get it off my nose and it worked great! I could see the strap might need stretching but I must have a small head because it fits me.