: Use an existing pair of well-fitting panties to create a template. Lay them flat on newsprint or corrugated cardboard and trace the edges using the "pin-poke" method to preserve the original garment.
: Use a zigzag stitch on a standard sewing machine to maintain fabric elasticity.
To create an artistic or DIY "piece" featuring mature-style underwear, you can focus on upcycling existing garments or professional flat-lay photography to capture the aesthetic.
Upcycling old t-shirts into comfortable underwear - Facebook
: You will typically need a front, a back, and two crotch pieces (one for the main fabric and one for the lining).
