The Adult Merfin Classic is available in Aqua or Coral. Build water confidence, inspire imagination, and make mermaid dreams come true! , contains recycled rubber. Sizes are Small, Medium, and Large. Adult Small fits USA size 6-8, foot pocket measures 9-1/2″. Adult Medium fits USA size 8.5-10.5, foot pocket measures 10″. Adult Large fits USA size 10.5-12.5, foot pocket measures 10-1/2″.