These are the most beautiful cuffs I own, and have ever seen. This is made up of two silk cuffs held together by chains and a silk ribbon. The actual cuffs are so gorgeous. The bottom part of the cuff that actually is on your wrist while you wear them is silk, with a lovely floral pattern. It's a shame that this is hidden when you wear them. The top part that's actually seen while you wear them is made of a wonderfully soft velvety material that kind of reminds me of a baby blanket. There is also a piece of silk ribbon across the top of the cuff. This is attached on one side to a clip that holds the cuff together, and on the other side it's attached to the chain that you can use to adjust the size, and is there to actually connect the cuffs. Both cuffs look like this. The middle consists of a silk ribbon that has a chain attached to both sides. The pieces of chain that hold everything together are actually made from a very light feeling metal. I don't think they risk snapping during use or anything, but it's not the strongest metal, as far as I can tell. Really though, if you're pulling on them hard enough to break the chain, the silk is probably going to tear first.
The actual silk part of the cuff is about 5 1/2 inches long, and almost 3 inches wide, the chains attaching the cuffs to the silk ribbon are 3 inches long, and the silk ribbon is almost 7 inches long.
A lot of the reviews on this say it's more for smaller wrists, and things like that, but to be honest, I have pretty chubby wrists. My wrists are about 7 inches in circumference. I do have to attach the little clip to the last link on the chain, but they do fit, they're still very comfortable to wear, and they're still incredibly beautiful.
As far as craftsmanship goes, I don't have a single complaint. They're very well designed, they're made of very sturdy material, and as long as you don't pull on them as hard as you possibly can, and only use them for light bondage, then these should last you for a very long time.