GIANT MICROBES E. Coli Mini Key Chain, 2-3" Mini Giant Microbes (Mini Microbe - Miniature In Size) - Great Gift Idea! Each 2-To-3 Inch Doll Represents The Real Microbe, Just Bigger Our Giant microbes Charm Is The Key To Good Health. Who Needs A Rabbit's Foot Now! Mix And Match These Cute And Small Plushies - Great For The Office, Desk Or Dresser! Other Key Chains & Larger Sizes Sold Separately