Delight Twins Heart with Two Pair of Baby Feet and Heart Charm Necklace 1.3 mm Box Chain necklace is adjustable from 18-20 Inches. Lobster claw clasp. Silver Tone Twins Heart with Two Pair of Baby Feet is approx. 0.64 x 0.72 x 0.09 inches (HxWxD) including loop. Silver Tone Heart with Cutout is approx. 0.66 x 0.58 x 0.11 inches (HxWxD) including loop. Perfect gift for twins, a new mother, grandmother, aunts, or godmothers.