Make straps from fabric, for use on home sewn cloth masks

The steps below were adapted from this instructional video.
  1. Take 4 strips of fabric each about 40 cm x 4 cm (~16 in x 1.6 in)
  2. Fold lengthwise and press. Stitch along the entire length and across one end.
  3. Turn the tube inside out. You can do this easily with something like a chopstick, or a tube and a rod.
  4. Press it flat so the seam is in the middle of the strap.