The blues, a bit more intense in person, are a mix of different glass colors molten on top of pure fold formed copper. This set has all donut shapes anyway the smaller have two perforations at the sides to be used as connectors or links.
Big donuts: 48 x 38 x 3mm approx., 51 x 41 x 8mm.
Smaller connectors: from 25mm to 22mm approx. as they are hand cut are not perfect circles and the shapes are rustic created to add more dramatism. I have cutters to create perfect circles but I really prefer the asymmetrical wabi sabi style.