I hear where you're coming from. I can only fit into an "A" cup if it's padded. I was once told that if you do this exercise, your bust line will increase making it look like your breasts have grown, too. What you do is, this is hard to explain but I'll try... you grab your fingers with your fingers, kinda like an "S" shape, and pull them apart. Your arms must be parallel to the ground and you don't actually let go of the hold.