Let me preface this by saying I typically wear a child's size hat/glasses because I have a tiny head. Per reviews I went with the S/M option recommended for women. The hat is cute and made from a good solid feeling material. It still looks cute on, I just with it fit more snuggly on me so I didn't have to worry about it blowing away with a tiny gust of wind or if we are boating. I will probably keep it if I can't find a smaller option.