Here are 100 tiny copper jumprings that I made. They are useful for all kinds of stuff and they are flush when closed. They are made of 20 gauge copper wire. These jumprings have a 2.5mm outside diameter and a 2mm inside diameter. Since my camera broke on me last weekend with the dreaded E18 error message, I can not take a good close up shot of these at this time. This necklace is made of the 22g but these are very slightly bigger. I hope this helps give you an idea of what you are looking at. They are the smaller of the two in the picture. I like the 20g over the 22g for heavy pieces. They look a little bit more substantial and are a tiny bit stronger. Feel free to e-mail me if you have any questions.