Fat models

[JupiterAmy]

However - do you mean that it is cheaper to make clothes for skinny people because less cloth is used, and that is why skinny models are employed? I'm not sure if I'm misreading you.

Sort of, but not exactly. More that having skinny models would mean that you wouldn't have to worry about body shapes - who's big up top or big on the bottom (and who's short and who's tall). Generally, compensating for different figure types. At a certain weight, most bodies are the same. So, they wouldn't necessarily be saving cloth/money because the models are smaller, but because they're pretty much guaranteed to all fit and look good in the same cut of clothes.