Delight Large ''Big Sister'' Heart with Clear Crystal Charm Necklace Silver Tone Large "Big Sister" Heart with Clear Crystal Charm Necklace. Charm size is approx. 0.6 x 0.74 x 0.13 inches (HxWxD) including loop. 18-20'' 0.9mm Snake Chain Adjustable. Lobster claw clasp. Great gift.