3x3.5" shrink-wrapped packs. Plastic sheets ©1962 Mattel Inc. These are paper envelopes with a U-shaped portion cut out in front to show plastic contained therein. Paper portions of envelope under shrink wrap show light aging. All are sealed and the 3 packs consist of the following different plastic sheets, metalized plastic, assorted plastic and color plastic. The amount of sheets contained in each pack vary although it appears to be a generous amount, especially in the assorted plastic pack. Contents Mint old store stock.