These are great mid-level cuffs with a bit of style to them. On top of that they" re crafted for comfort as well as function. The cuffs are made of blue and black leather. Each cuff securely fastens to your partner with the use of a buckle -- this also makes it easily adjustable for comfort. The cuffs come with an O-ring attached to a D-ring for easily connection to your other bondage gear. Fits ankles between 10.5 and 13.5 inches in circumference