I can remember mom doing this to my brother's shirts, but for him it was ruffles made from quilting scraps. It was very, very effective. But she also had a second reason for doing it. His weight never fluctuated, but he was always growing up. A couple inches added to the bottom of his shirts could buy another year before he completely outgrew them. She did the same to our pants when the hems couldn't be let out any more. I would get cute ruffles around the legs, but she'd try to match fabric for Bubba's pants.