Im 53, 190lb and wear size 14. I carry my weight in my stomach and breasts. I initially ordered an XL, but had to return it because it was entirely too small...couldnt snap it.
Then I ordered a XXXL which fit. Be careful not to zip your stomach fat up like me lol . If I lose 5lb that shouldnt happen again.
I would recommend this product just size up unless you have a small waist / stomach.