The Strict Leather Standard Leather Locking Cuffs are great for those wanting to experiment with bondage. They are affordable and yet still offer a high level of quality. They are durable, good looking, and come with locking buckles for additional security. Measurements: Wrist Cuffs: 8.63 inches in length (4.32 inch in diameter); Ankle Cuffs: 10.5 inches in length (5.25 inch in diameter). Material: Leather and Metal. Color: Black