Well, the “ruebenesque” ones probably have a college degree, or at least own a thesaurus. Most are “full figured” or “curvy” or “big & beautiful”.
I don’t know if there is some scale that you can use to interpret those in a meaningful way, or if they are all equivalent. Actually, come to think of it, I am not really interested in finding out!
I believe Fluffy is the correct term.