I was checking out some Columbia straw hats today and neither of the sizes they had fit me. The L/XL was too big and the S/M felt a little tight. Both came with a string that allowed the hat to stay secure on my head. I'm debating on which hat I should get. Even though the L/XL is too big, it does stay on my head with the string. I would rather the hat be too big then for it to be too tight and give me a headache. Which hat should I get? I would look at other hats, but these ones offer great sun protection and they are only $15! lol