Doubl Glo Vintage Valentines Day Cards

This is a vintage package of "Cute Valentines" made by Doubl Glo These are the type kids would give out in school to their classmates -- the package even says "Educator Approved"! They are still in the original, unopened package, which is marked that there are 15 valentines. Being in a sealed package, I would say the cards are in excellent condition, and I am unable to give a size, but the card shown in the "window" feels through the package (carefully) to be about 3-4"" long and about 3" wide.