In this post, I’ll show you how to refashion a thrifted prom dress to make your own petticoat or crinoline. If you have a circle skirt or a full skirt with lots of fabric, a petticoat is helpful to give it some shape. This is a quick and easy project, and most thrift stores have a selection of old prom dresses, so it’s easy to find the materials. I bought a dress that was several sizes too small for me, but the tulle part of the skirt, which started further down from the waist, was just right for my petticoat. You could also buy a dress that was too big and just gather the tulle fabric more or cut out some of the excess fabric.