They measure 11 inches across when stretches out. They are made of aluminum and t is a swivil in the center. They are marked Hiatt. We recently bought a large collection of handcuffs from the attic of a wealthy Princeton estate. The man had collected these for over the past 40 years. We will be selling them on ebay over the next several months. Please click on view sellers other auctions link above to view other handcuffs that we have listed today. We have described this item to the best of our ability. Please ask all questions prior to bidding. Buyer pays S&H. T is a $5.00 minimum handling charge on this item, plus shipping.