Peruse vintage patterns for a while, and you'll quickly notice an oft-used convention in the illustrations: two "normal sized" models and one "mini," squeezed in to show the back view or a third option. Usually, it works just fine and dandy, like in Simplicity 2402:
There, the poor mini doesn't even get the benefit of a full body! Here's another example -- Simplicity 8535:
Sometimes, however, the Two Big/One Little goes horribly, horribly wrong. Take Vogue 1059:
Yikes! I don't know whether Black is petting Little Print with her absurdly large gloved hand or if she's just conjured her out of thin air, but I guarantee you she's up to no good. I predict she has a whole host of nefarious plans that she'll be sending Little Print out to enact. Is Red in on the plot? From the look on her face, I have to assume so.
This I do know: if I wake up in the middle of the night with Little Print standing next to my bed staring at me, I'm toast.