Here you go, mystery solved:
http://www.ebay.com/itm/D5-WWF-Superstars-Gold-Bond-Ice-Cream-Bars-Advertising-Sign-Sticker-Sid-1992-WWE-/181283185881?pt=US_Solo_Sports_Fan_Shop&hash=item2a3551e4d9
They come off boxes of the old Good Humor WWF Ice Cream Bars. There were at least two series of them. The set pictured was 12 cards and had at least these:
Hulk Hogan
Demolition
Honkytonk Man
Bobby Heenan
Randy Savage
Brutus Beefcake
Ted DiBiase
Andre the Giant
Big Boss Man
Looks like there was also a second series with a red background:
http://www.ebay.com/itm/P9B-Vintage-WWF-Wrestling-Ice-Cream-Bars-1988-UNCUT-SHEET-Poster-Hogan-Macho-WWE-/171267153592?pt=US_Solo_Sports_Fan_Shop&hash=item27e0515eb8