Nothing short of surgery or gaining body fat can actually increase the size of your breasts. As for making them look bigger, well, that's why the chunk of change we spend on bras each year is larger than the GDP of Iceland.
Push-ups and padding aren't your only options, though. "Developing the muscles underneath your breasts will enhance the look of your breasts and make them appear larger," says Jen Comas Keck, a certified personal trainer and former figure competitor.
Let's be honest: This workout won't turn A cups into Bs or beyond. But if—like most women—you rarely train your chest, then you're missing out on a natural way to add a little extra oomph.