Handcuffs measures 21 x 10mm (2.1 x 1cm).
Stainless steel chain measures 17" (43cm) in length.
Necklace can be made 16"-24" (41-60cm), simply let me know which length you prefer in the "Note to Seller" section during checkout.
Slightly thicker chain for men also available upon request.
Visit my shop for more styles.