This may sound off the wall, but could someone measure across the ear caps on a BM and MS3? I have to corkscrew my SGB on at present. I may upgrade if they are larger. TIA
MS 3 is 9" ear to ear on the inside of the helmet. BM is 9 1/8" ear to ear on the inside plus his ears are molded onto his helmets so it actually creates a little more width on the inside of the helmet due to the casting.
As far as the largest currently available Helmet, I would go with the MLC... its a bit larger then both the MS3 and the BM. Of course the MSH2 is the one to get for large size but good luck finding one.