that's not what "light expansion" means lol one would think you're talking about physics for tags variants we generally use "low", such as "low lolicon", but right now it's rare and it's usually used for tags that can be considered extreme. For breasts expansion I don't think that would be worth it. Also it would be impossible for this tag to be objective. If it's too small of a difference then I don't know how it would even matter. At most you probably just want to avoid extra large body modifcation and for those tags we have things like "gigantic breasts", as for proposed tags we have create tag hyper +54 and some other similar suggestions