COLORFUL: Four colors make these easy to spot underwater. GREAT FOR POOLS: Bring these to your next pool party or use them as party favors. A great addition to any underwater play. Manufacturered by Blue Panda. LARGE RINGS: Easy to grab a hold of and bring to the surface. DIMENSIONS: 6.3 inches in diameter HONE YOUR SKILLS: Set of 12 dive rings allow you to improve your diving and swimming skills by retrieving them.