Our beaded stoma covers are made from plastic beads which look like pearls. There are three styles of covers to choose from: Large Pearl, Small Pearl, and Black and Ivory Pearl. The beaded stoma cover fits necks up to 16 inches around. On one end has a hook that attaches to the other side which has loops. A foam filter should be attached to the skin above the stoma or to the reverse side of the beaded stoma cover to protect the integrity of the pearls from debris.