About X-Men: Mystery Super Villains Chef Boyardee (Promo)
The 4-card hologram set was available thru a mail-in offer when 5 proof-of-purchase seals of various Chef Boyardee pasta products were submitted.
The sticker is approximately 5" x 4" in size, comes on a card with a Chef Boyardee pasta nutrition chart on the side, and was packaged with each case of Chef Boyardee canned pasta bought.