Autism Puzzle Charm Rubber Necklace

Autism Puzzle Charm Rubber (neoprene) Necklace:  The puzzle piece is genuine .925 sterling silver charms measures: Width: 1/2" or 13mm, Height: 5/8" or 16mm, Gram Weight: 1.4.  18 inch 2mm Rubber Necklace (unlike natural rubber, neoprene will not burn or tarnish silver). With .925 Sterling Silver Finished with sterling silver ends and lobster clasps. Made in USA.