Love the look of this hat. I purchased the Large size, due to my larger head; however, it is slightly loose. I'm not sure it would stay on if a strong wind blew, so I may sew a small elastic piece in the back. Thought about exchanging for the medium size, but I'm afraid that size may be too tight. Honestly, the hat is too cute not to keep and I have tried on quite a few recently. I plan to use while on Safari this year.