How do you sew a crinoline?

Oh dear! Are you sure you want to? To begin, I use a very short purchased half slip. It should cover your girl goodies without reaching the knees. Then purchase at least 6 yards of netting. For a simple crinoline, simply gather those six yards and then adjust the gathering to fit evenly around the hip line of the purchased half slip. Zigzag the netting in place, and bias tape those six yards at the correct length. If you don't bias tape, use lace or ribbon to finish off the net; otherwise it will rip and snag stockings. For a square dancing crinoline, the same principle applies, but you need 50 yards of net. There are patterns for this type of crinoline.