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AR15.COM
Armory Sponsor
9/24/2007 12:51:52 PM EDT
I'm looking at several different sights with surplus helmets on them.  They all have them listed as xsmall/S/M/orL
some of them use the denotation 6.75/7/7.25/7.5
As sizes.  Does anyone know how they dervive these numbers and as for sizes how do I measure my head to see what size would be most appropriate.  Just run a tape measure around my head?
Thanks.
Armory Sponsor