Helmet sizesJune 14 2010 at 2:11 PM
Response to Para/Dispatch/RAC Helmet Shells: 2 Sizes?
Yes there were two body sizes for DR,Para and RAC helmets:
Normal was for head sizes 61/2 to 71/4 and large for 73/8 to 8 1/2.
I do not have any large British examples, for any types, but the small variety measured 270x235mm. I do have a large Canadian DR steel, it measures 280x245mm.