14 Jan Do you have small red or white bumps that resemble goosebumps on the fleshier areas of your thighs and arms? If they don't itch or they itch very little, they may well be keratosis pilaris. This is a common condition, affecting approximately 50 percent to 80 percent of teens, and 40 percent of adults. 16 Jun How to Make Skinny Legs Bigger. While many people wish they had long, lean legs, some people with skinny legs wish their legs were curvier or more muscular . Luckily, you can make your legs seem bigger through diet, exercise,and even what. Not Helpful 5 Helpful Wouldn't doing leg exercises make your legs larger? I'm looking for how to get slimmer, smaller legs. wikiHow Contributor. You'll need to change your diet in order to lose weight including your leg fat. Exercising will help you to get faster results and it will also remove more fat around these areas.