This is a necklace with scattered rhinestones. The chain length is approximately 40cm. The adjuster is approximately 4cm. The back is hollowed out in a heart shape (photo ②). The heart size is approximately 2.5 x 2cm. The thickness is approximately 1.3cm. The material is unknown, but the color is silver. The chain was too short for me, so I would be happy if someone else could use it.