Marvel Avengers Superhero Rings Party Cake Rings or Cupcake Toppers Toy Rings 12 Pieces. 12 assorted plastic avenger hero cupcake rings. Excellent as party favors, Halloween giveaways, grab bag fillers, etc. Sturdy plastic rings provide long-lasting enjoyment. Rings are made from a solid plastic with a center break. Average size of the graphics surface is 1 1/4" and the ring opening is 5/8".