Our son really looks like Harry Potter in these glasses and they fit his face really well --he is 7 years old but is about the size of a 9 or 10 year old.  They fit me, too, and I am small adult -I think they fit the target Harry Potter age group well.  Very nice quality for a costume; the lenses even offer UV protection!  The frames are like low quality regular glasses that you would get from glasses store.