New Fashion Necklace Gold Plated Link Cable Chain With Heartbeat /Electrocardiogram Connector About 18 long, 1 Piece Material: Gold Plated Zinc Based Alloy Size: Approx:45cm(17 6/8") long long Hole size: / Thickness: / conversion : 1 inch = 25.4mm or 1mm = 0.0393 inch Color: Gold Plated Quantity: 1Piece per pack Part No. B77458 Note: Heart: 10mm x8mm( 3/8" x 3/8");Electrocardiogram: 3.2cm x2.3cm(1 2/8" x 7/8");Chain Size: 3mm x 2.3mm( 1/8" x 1/8");Overall Length: 20 Inches;Extender Chain Size: (2 6/8").