This Red S badge or emblem is a replica gold foil, oval adhesive to be used on the White (aka: Celery or Light Turquoise) Singer Featherweight Sewing Machines.  The original white Featherweight badges were a foil that was glued in place.  This is a replica with a  strong sticker-like adhesive, measuring the exact height and width.  Be sure the oval surface area is clean before applying to machine.