your right bout that wolfy , abit of padding will make it look bigger on the armor and the helmet , adding a bike helmet or skater helmet inner padding will make it look abit better .
the real question is does it feel too big. it may look out of proportion to others but you have to worry about it fitting you comfortably, and unless you are walking around looking like a lollipop i dont think you have to worry about it being too big
Ive had the same troble! the helmet looks 2 big and when i re scale the armour the armour looks 2 chunky, geting it right is a pain. i recomend going with what you got
I made padding out of craft foam, and it fits great, but I will have to add a chin strap so it wont fall forward off my head. Also I think the chest looked too small because the bicep was hanging off. So I fix it.