A jumpsuit is a one-piece garment that has a top and a bottom piece. It's a common uniform style for factory workers and military men. Over the years, the design has transitioned into fancy versions for fashion purposes. With a little creativity, you can create your own jumpsuit out of old trousers and a top.
Lay the old top and trousers on a table. The top can be an old suit, blouse, T-shirt or a tube top. You may also use calf-length trousers or pedal pushers for the bottom piece.
Tuck the shirt into the trousers. Mark the tucked portions.
Take the top and cut it across the bottom at least 1 1/2 inches below the markings. Take the trousers and cut the waistband to remove.
Create a waistband out of the portion of the top that you removed in Step 3. You may also create one out of another fabric that matches the top and the trousers.
Lay the top, waistband and trousers on the table. Measure them and make sure that they have the same width. If one piece is wider than the other pieces, pinch the sides and sew on the inside to reduce the size.
Sew the edges of the pieces (top, waistband and trousers) together. Turn the jumpsuit inside out and sew by hand or with a sewing machine for a clean finish.