Sterling Silver Double Sided Autism Symbol Puzzle Piece Necklace Oxidized Sterling Silver Charm Height 14 millimeters (0.55 inch) x Width 14 millimeters (0.55 inches) Charm Weighs Approximately 1.6 grams (3.7 grams including 20" necklace) High Polished Box Chain Thickness Approximately 0.7 millimeters (1/32 inch) Spring Clasp on Necklace