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The listing is a bid odd. The text is different depending upon whether you select "cream" or "tan". The text for the "tan" hat is much more informative. It sets out the actual size (in inches) of each variant. It also tells you that the hat comes with its own size adjustment, which is just as well as otherwise the hat was too big for me. It is actually a very nifty feature. It means that provided you chose the hat that is in the ballpark so to speak you will be able to get the perfect fit.
Let me quote the sizing bit for ease of reference: Fit SMALL 21¾" - 22¼" & MEDIUM 22" - 22¾" & LARGE 22¾" - 23½" (convert to cms by multiplying by 2.54)
The hat is a bit "floppy" for my taste which really was not evident from the photos and that is the reason for the 4 stars (even with the nifty sizing feature). But for $30 it does seem value for money. Though, that said, I happened to be in a department store two days ago (after I had placed the order) and found a near identical hat marked down from $25 to $5, but I like this one more. The only question is, do I like it $25 more? Hmmm...