Sailor Moon "Cosmic Heart Compact" necklace. Official Sailor Moon merchandise from the Sailor Moon Store in Tokyo. The chain is adjustable in length. 

the Cosmic Heart Compact is the 3rd transformation brooch given to Usagi Tsukino to transform into Sailor Moon. It was given to her in episode 91 along with the Spiral Heart Moon Rod. To transform she shouts, "Moon Cosmic Power, Make Up!"

Chain length: 17 inches. Adjuster: 2 inches.

Heart measurements: width: 1.5 cm, length/height: 2 cm, depth: 1 cm.

Material: Zinc alloy, iron, glass, brass.