ALIM U Measure yer head and compare to Cressy size chart.

Shelley R I do a lot of shopping online and found this tool on another web site when I was looking for a scuba hood for my boyfriend and bought this product from leisure pro. Good luck! Scuba Hood Size Chart Measure around head at largest point... normally where the band of a baseball cap would fit. Hood Size XS SM MD LG XL 2X Inches 20-21 21-22 22-23 23-24 24-25 25-26

HENRY P To determine the correct size, I used a common-sense approach: As I'm kind of a little big-head, I selected Medium size and it proved to be the correct size (I was crossing fingers though because I live abroad.) If I lived in the US, I would buy 2 or 3 different sizes of the same product and try them on at home. There will be one of them who would be a perfect fit. I would return the others unused with a note of explanation that the items are being returned because they are either bigger and/or smaller than my correct size, which I am keeping for good. I hope this helps in your decision. Good luck, and greetings from Lima, Peru. Visit my YouTube channel at WWWdotYOUTUBEdotCOM/user/hpowerp.