Each tiny charm measures 3/8" (9.5mm). One is personalized with a tiny heart design, the other, an initial of your choice. Available in solid .925 sterling silver or 14k gold fill. Material and chain length can be made from the drop down menu. Please leave me a note in the personalization box with the initial you would like. Necklace With Heart, Tiny Charm, Tiny Heart, Initial Charm, Charm Gift, Initial Necklace, Heart Design, Solid 925 Sterling Silver, Chain Length