Necklaces / Pendants by Alena Asenbryl When necklace is lying flat the dimensions are 480 x 85 mm. It is light to wear due to the nature of the material. Features Primary Material : acrylic Other Materials : precious white metal Length (inches) : 16 One of a Kind : No Hallmarked : No Cleaning InstructionsThe whole piece can be rinsed with soapy water and dried by patting with a cloth. If the fragments of metal tarnish they can be cleaned with silver dip, this will not damage the plastic in any way.