Well.. to be fair she looks plus in that gluttony image while she does not in the pride one.

Plus size or not, in gluttony she looks, plus size. The problem here I think is the cliché.

Obesity is not only a matter of over consumption. And that model, or alteration is far from obesity. Obesity can be due to hormonal problems, the overcomes that you refer, in obesity is related to emotional eating. The sin of gluttony is about having too much pleasure in eating.