HJC makes some reasonably priced DOT, Schnell approved full faced helmets. The size is a toughy. Are the women/girls you plan on having ride along with you petite or tall or?
A medium might be your best bet. I have an HJC half helmet in a large, but then I am a tall person with a big brain.
I personally can't wear HJC full face helmets because they tend to be more "round". I wear a KBC because it's more "oval".