User blog comment:IamJakuhoRaikoben/Chapter 461: That Perfume is for Somebody, Review./@comment-5303512-20151110172248/@comment-25111584-20151111072409

@anon: Size does affect weight. *looks at Molding Magic* Law of Conservation of Mass never existed in FTverse. ^^" Plus, the body collapsing on itself would be a bit too sciencey. If we're going that far, then we might as well wonder how many FT characters show such great physical feats when they would normally be impossible as performing such feats with such bodies would require a constitution which would end up with the body crushing itself.

That said, I completely agree with you regarding not getting too technical about it when Mashima himself is not trying to bring science into it. ^_^/

@Wrath: Wut? She doesn't change mass? You mean she can use Gravity Magic?