The first one I made was actually a sample square for the weighted blanket I'm making him. This is the one that everyone loves. It's made from stainless steel rings in European 4 in 1 chain maille pattern. The rings are mostly 18g 3/16", but there are some 20g 3/16" at either edge to cut down a little on weight. It's about 4" x 2.75" not spread out. Spread out, at the widest, it's about 4" x 3.5". The weight on it is 2.2oz. What's so nice about it is that it drapes over the hand, between the fingers, wherever and feels almost liquid. It also has a beautiful jingling sound, if you like that sort of thing. One cool thing about this one is that if you grab it between your thumb and a finger, you can turn the individual rings around.
Here are some pictures of it:
The second fidget is made from 18g 5/32" stainless steel rings and 18g 3/16" black EPDM rubber rings. I made this one into a tube so that it would fit over the finger of a child or small adult. It's lighter than the large fidget, weighing in at .8 oz. Laying flat, it's about 1.75" x 1". Here are pictures of it:
