Silver Tone Large March - Hot Blue Birthday Crystal Silver Tone Heart Blue Crystal Diamond-Shape Earrings. Birthday Crystal Heart is approximately 0.50 x 0.52 x 0.15 inches (HxWxD) not including loop. Back is smooth and rounded. Enamel and crystal Lulu Diamond-Shaped Earrings are approx. 0.5 x 0.42 inches (HxW). Earrings have steel posts. Earring backs are Bullet ''Clutch'' Style with Plastic Pad. Earring colors available: Red, Orange, Lime Green, Green, Teal, Blue, Purple, Light Pink, Hot Pink, Black, White, and Brown. PLEASE NOTE: Our products are lead safe, but are not intended for children 14 years and younger.