Name on Rice Heart Drop Glass Vial Charm. Note these glass vials all slightly different in shape some hearts may be rounder than others and what is pictured. Personalize and customize a message on a grain of rice for your necklace, bracelet, anklet, keychain or purse charm. Standard cap average 0.53g base metal plated, light weight. Average size of glass vial 6mm diameter by 1″ length.?