ECR4Kids Jumbo 4-To-Score Replacement Rings, 20 Piece, Assorted Colors Replacement Rings  heavy-duty rings designed to be used with ECR4Kids Jumbo 4-to-Score Assorted Colors  includes 20 brightly colored replacement rings, 10 of each color Kid Friendly  Designed to be held by children and may be used for ELR-12507 and ELR-12521 Certified and Safe  GREENGUARD[GOLD] Certified for minimal chemical emissions into indoor air Dimensions  5.25" L x 5.25" W x 1.5" H