I think the larger size is what determines the amount of eggs. Its what can fit in their body cavity/oviduct, combined with avaliable fat stores.
I'm not saying smaller females definitivey can't have large clutches but if they do its likely going to be smaller eggs or perhaps some boob eggs /slugs.
A 3000g+ female can drop, say a 12 egg clutch easier, but a female thats half her size its not really likely just simply due to the avaliable space in her body for eggs and the fact she just may simply not have enough energy stored up to produce a large amount of follicles.