Because most hand models are freelancers, the amount of work they get in a month can fluctuate wildly. So while $13,000 for one day of work might seem like a small fortune, it might have to last ...

At the end of her last photoshoot in September, which lasted 12 hours, Vong Dinh Y sat down to massage her tired hands. "Two years ago, when I was working as a promotion girl, many people praised me ...

But that doesn't mean hand models aren't subject to the same cruel winds of ageism. Like other people who trade on their looks, hand models sometimes struggle to find work by their late 30s and 40s.

Korwin’s agency has over 200 hand and feet models, and she has long advocated for this modeling arena. “Parts modeling is the unsung stepchild of the modeling industry,” she says.

Full coverage: The World's Highest-Paid Models, 2014 Premiere parts models earn around $1,000 a day for TV commercials, and between $2,000-$5,000 a day for print work. “A top girl – a hand ...