I,m a big guy, 6 foot 1, 220lbs. I DID MY RESEARCH ON SIZING! You can type "PRO-TEC sizing chart" into google and find the proper size. After checking the size I went with xl. Fits perfect! Imagine that I took 1 minute of my life and looked up their sizing chart rather than just guessing. The sizing chart was to scale for me and I bet it would be for you. Great lightweight product, feels like it could take a hard hit and protect your noodle. Wouldn't think twice about buying another PRO-TEC.