The sun hat is advertised as 6-18 months but it does not fit a 6 month old and probably not a 12 month old.  It needs a pull string to reduce the size of the head band for the younger / smaller heads like the flap hats do.  I am going to have to sew in some elastic to be able to use it - not my idea of a useful purchase.  Will stick with the flap hats until I see brim hats with a drawstring.  Otherwise nice, light material.