|Originally Posted By DonnieBrasco:
Originally Posted By murderman:
Here is a cold link to the Ops Core page for their fast base jump. It illustrates how the measurements should be taken for their product line, which may or may not be applicable to other products, but it least it gives you a starting point.
ETA - Proper helmet fit is very important; try the actual product on before purchase if at all possible.
By Ops Core method I fell into the M/L measurements, but just barely. After getting the helmet I was unable to use it with hearing protection and it felt too small for me.
I ended up getting the L/XL and am much happier.
Dito Here. My ops core sizing chart had me at the upper end of M/L. The fine folks at TNVC told me to get the L/ XL absolutely. I followed there advice and it fits like a dream. I think the ops core chart is on the small side.