This Mid Century set of 28 Christmas decorative reflectors for miniature Christmas lights can be used with or without the 10-petal mylar foil poinsettia backings. The clear plastic flower shape reflectors are about 1-1/4 inches diameter with 1/4 inch center opening. Each of the 28 transparent flowers comes with two poinsettia flower backs, about 2 inches diameter - one metallic bright red, the other iridescent pearly white. Use both or just one color, secured to the plastic flower center with the tiny rubber bands included. Although I don't have the original package, they are Lite-Kaps brand reflectors by Decor Noel, originally sold in packages of six to eight in the late 1960s and 1970s.
There's one extra center plastic reflector, white poinsettia back, and rubber band. The rubber bands are a little dry - care should be taken when securing them to the reflectors so they don't break. A great way to dress up your plain Christmas miniature light strings.