Per the CRLs:
- Helmet size will be judged on a case by case basis. Generally, the helmet’s width should not greatly fall short of or exceed 1/2 the width of the wearer’s shoulders measured from armored shoulder plate to armored shoulder plate.
You look pretty close there. A suggestion might be to bulk out your shoulder plates a bit. Add additional layers, thickness, or trauma plating. this will increase the overall width of your kit, and make the proportions of the helmet feel a bit more consistent.
You got a great looking kit going on there.