Making your own pair of trousers offers more than one perk, including the fact that you get to choose the exact type and pattern of fabric, allowing you to create a quality pair of trousers for far less money than buying them in a store. Patterns can be purchased in a variety of styles in craft stores or online, or you can create your own by drawing on pattern paper with a pencil. If you make your own pattern, remember to leave 1 inch of fabric on each side to allow room for inseams, and 4 inches at the top for the waistband.
Lay out enough fabric in the design and type of your choice to fill your pattern. If the pattern contains two pieces, the fabric should not be doubled. If the pattern only has a single piece, double the fabric up.
Use sewing pins to secure the pattern on top of the fabric. Cut the shape out using a pair of craft scissors.
Face both pieces of fabric together so that the inside of the trousers are facing outward. Secure with sewing pins.
Sew the inside of the legs together in a single line, about 1 inch inward from the outside edge. You can use a loaded sewing machine or do it by hand with a needle and thread, but if you opt for the latter, make sure to use consistently sized, tight seams. Knot the thread to secure it and cut the needle free using a pair of scissors.
Sew the outside edges of the trousers together, again keeping the seam 1 inch inward from the edge of the fabric.
Fold the top of the trousers down 2 inches and secure with sewing pins all the way around at the bottom of the fold. This will create an outward pocket that rings around the top to hold the elastic waistband. Snip a single line in the pocket so you can feed the elastic in later.
Sew the pocket shut, leaving only the snipped part open. Knot and detach the needle from the trousers and feed the elastic through the pocket until both ends meet. Pinch the ends of the elastic together with your fingers and pull the snipped pocket ends to overlap each other and cover the waistband. Sew this small section shut with a needle and thread by hand. The thread should bind both ends of the elastic together as well as seal the fabric opening shut.
Turn the trousers so that they are right side out.