Dry fit the starfish on top of the napkin rings by arranging them until you find the way you want them to sit on the finished napkin rings. Be sure each starfish has a good point of contact with the napkin ring for you to glue them.

Working one at a time, remove the starfish from the napkin ring and place it face down on your work surface. Using a hot glue gun, carefully place one drop of hot glue on the center of the starfish. The glue drop should be large enough to fill any gap between the starfish and the napkin ring but not drip over the sides.

Hold the napkin ring level on your work surface and replace the starfish, glue side down, on the napkin ring. Hold the starfish in place for a few seconds for the glue to set up.

Repeat with the remaining napkin rings.