I wasn't sure about the size. I have a monster 23" head, and I was not sure whether I should get a large or an extra large. I posed my question to the Amazon community and the consensus was to get the XL. Which I did. Thankyou gratefully to all who responded. The fit is perfect with the ever so teeny weeny cinching of the drawstring. I am going to the Caymans in a month, and with a history of basal cell carcinoma on my nose, this will make me enjoy my time in the sun. It is seriously cute and floppy and funky all at the same time. Beautifully made... no crummy stitching issues. I appreciate a quality product, and this is true quality. Don't hesitate to buy this.