I need lounge pants. Desperately. Because I've worn mine to death, especially those in comfy woven cottons. I decided I gotta make one, pronto. Too lazy to trace any paper pattern in my collection, I used the following method.
I used my old, trusted lounge pants. Fold it, making sure the crotch part is pulled all the way out and pin to folded fabric. Cut the fabric (on the fold) with seam allowance i.e 2 inches longer at waist and hem and 1 inch bigger on the sides.
Unpin the old pants. Take the above piece and pin again to the remaining yardage to cut an exact second piece. You will have two folded pieces of fabric for the "new" pants at this stage.
Open the 2 pieces of cut fabric. With right sides together, sew (or serge) the crotch top sides as shown above.
Now, take the middle of the pants and pull open so that it lays like above. Sew the inseam as shown by arrows, going all the way round. Zig zag stitch or serge the seams edge.
Hemming - Press the hem 1/4 inch, press again 1/2 inch for both legs. Stitch hem. Do the same for the waist, but do not sew all the way round. Leave a 1 inch gap to thread the elastic in.
Elastic - measure your waist and take off 1 inch - that is the length of elastic you need.
Thread the elastic using a pin through the gap created before. Overlap the elastic ends and stitsh to secure it. Sew the gap close once elastic is threaded.
Press all seams and voila!
So comfy! Am totally hugging myself here :P