First position your wig strap in place around your head making sure that the stationery fastener is right behind your ear.
Use an ink pen to mark the points where you will be cutting the strap. Usually you will cut the portion that is directly across the forehead.
After marking your cutting points, remove strap and cut out that middle section.
Use some kind of Quick Fix or Crazy Glue on the edges of the strap to prevent them from fraying.
Sewing onto Lace Wigs: Position the stationary fastener right at the edge of the lace wig. This position allows the slider to tighten to maximum capacity. Pin strap in place then proceed sewing your straps onto the lace.
Sewing onto Closures or Integration Systems: Pin strap in place then proceed sewing your straps to the lace.