Using stretch lace, a jersey cotton scrap and regular thread...they are rather inexpensive. I found a really easy free pattern from Deby at So Sew Easy.
Deb's Lace & Trims has a HUGE selection of the lace you need (make sure it is the stretch kind). Her prices are very reasonable and she is FAST on getting it to you so you don't have to bite your fingernails waiting to start your panties. She sells in 5 or 15 yard mini-bolts; this may sound like a lot, but you will definitely want to make as many panties as you can because they are so easy and quick AND comfy. I received my 5-yard bolt and it resulted in 4 panties (2-small and 2-medium).
Here are the instructions, although you can find pictures and how to at So Sew Easy as well.
- Print your free pantie pattern and put together your pattern. Then cut out the size you are using. Note: I found that even though my hip measurements resulted in the medium sized pantie, the small fit much better.
- Cut out your 2 pieces of lace.
- Cut out your 1 piece of cotton jersey for the liner. Note: I used a double layer of jersey for extra breath ability and comfort. I serged the side edges with woolly nylon for softness.
- Sew the front and back center seams (the curved edges) using an overcast stitch or a serger. If you have an overcasting foot, it is superb for getting a nice narrow finished seam for the lace. This is not necessary though, you can use a stretch stitch or zigzag as well.
- Line up the center front and back seams at the crotch and sew.
- Pin the liner centered over the crotch seam and stitch using the triple stretch or zigzag stitch along each side. You can also stitch all edges, but I found that it looks better just stitching down each side. RTW panties often leave the front and back edge open.
- Clip all of your threads and you are done.
Wear in comfort and good health!