Decide what side you want to ruche. I ruched the front of mine, but you can do either side!



Find the center of the panties by folding them in half and placing a pin vertically on the folded edge. This is just to mark the center; don't pin the sides together.



Cut a small piece of elastic 1.5" in length.



*** For these next few steps I did this all by hand which I found the easiest ***



Sew one end of the elastic to the top center edge of the panties where the pin is marking sew(see image). Sew the other end along the center line but 2.5" lower then the other edge. Since 2.5" is longer than the elastic your underwear fabric will bunch (this is what we want!)



Use your fingers to pinch (bundle) together small parts of the fabric that is between the two ends of the elastic. Sew several bundles of pinched fabric to the elastic to create a ruched effect.