Silver Tone Large May - Green Birthday Crystal Silver Tone Heart Crystal Initial - Sophia Necklace. Birthday Crystal Heart is approximately 0.50 x 0.52 x 0.15 inches (HxWxD) not including loop. Back is smooth and rounded. 1.5mm Dainty Cable Chain Necklace: 18 inches with 1 inch extender chain and lobster claw clasp. Silver Tone Small Crystal Initial with Beaded Border is approximately 0.38 inches not including loop. Dainty and delicate, the Sophia Collection is about wearing an expression of what she cherishes, with just a little bling to brighten her day. PLEASE NOTE: Our products are lead safe, but are not intended for children 14 years and younger.