Zack W Please follow the link below to see the manufacturer's size chart, and scroll to the bottom to see the Hoods section; http://hyperflexusa.com/size-chart/ Enjoy it! Zack.

carol d Zack, I understand that part.... how do you size it? I measured the circumference of my head, is that correct? Where on your head, like a bike helmet around your brow just above your ears? Or another way? And what size do you pick if you are exactly between sizes? Many thanks!

Zack W Please select one of the size options available, and add it to your cart. Enjoy it! Zack.