We have 2 Packages Party Paper Napkins nos Vintage items.   They are made by Hallmark with a green/silver bridal shower design on a white napkin. They are 13 1/2" x 13 1/2" and there are 20 in each package. I would estimate that these would date somewhere around the 1970's/1980's or so.

2 Napkins Packages Party Paper nos Vintage