I should have paid closer attention to the reviews that said this hat was very small.  I bought it when my baby was just past 3 months old.  She is small for her age (25% percentile on the growth charts), and the 0-6 month size hat is very tight on her.

Another reviewer gave the instructions on how to remove the elastic, which gives the hat more give.  I will be trying that so my baby can hopefully get some use from this.  This hat is very nicely made though, and very cute for either a boy or girl.