I bought the hat as an adult after talking to the company because it was really on sale and loved the color.  Found out the sizing overlaps between large kids and small adult.  This hat is too big however.  The inside fabric for the headband sticks out and is visible as it is a different color.  The hat is sort of adjustable but OR seems to have really odd shaped hats as far as I'm concerned.  So if you adjust it smaller the hat shape looks off.

 I ordered three different OR hats as part of a pre-Christmas deal and don't really care for any of them.  The colors are great (fig and a mint green) but just don't see how they will offer much protection either.  Disappointing since these hats get such raves reviews.  I hike a lot and was really wanting these to work to give my old faithful hat a rest from time to time.