The armor looks a little bit big, but you are customing it so it's what suits you.
Have you shaped it with with a heat gun-or the like, this will help it fit you better.
The armor will look fine once you put on the rest of your suit.
I'd probably scale down the collar piece a little more and move it up closer to your neck.
ok thank you. maybe I can trim some of the armor 1/4 all the way around to make it a little smaller ? I do use a heat gun to shape my armor.