Necklaces / Pendants by Alena Asenbryl When lying flat the dimensions of the necklace are 320 x 220 mm. The item is light to wear due to the nature of the material. Features Primary Material : acrylic Other Materials : plastc coated nylon thread and 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.