Order a precut wood monogram to finish as desired.
Spray generously with spray adhesive.
While wet, coat thickly with glitter. Let dry then shake off excess glitter.
Don't let glue get on top of glitter, since it can dull finish.
Hang with ribbon from a small nail or tack.
You can also use spray paint with glitter for a solid color with a touch of sparkle, or clear coat with glitter for a transparent coating that lets the wood grain show through. Follow instructions on can, using thin, even coats.