>>1175115>>1175179For me, I certainly like the feeling of chub, but it's more the psychological aspect than the physical that does it for me. The types of things that could lead a girl to letting herself go, either intentionally or unintentionally, and how they handle their encumbered form and are treated by others afterwards. I can thus handle most sizes, even impractical and somewhat unrealistic ones, as long as the narrative or artwork focuses on those aspects of the kink.
Most of the time that requires a girl starting thin and gaining though, and there's only so more change a girl's mental state and daily routine can go through once they hit a couple hundred kilos, so continuing beyond that point often feels redundant. Furthermore, blobs of a certain magnitude are both hard to imagine fucking and fantastic enough to kill my suspension of disbelief to a point where it negatively impacts my arousal, so it's not worth hitting those sizes unless there's a really enticing payoff somewhere else to make up for it.