I made this dice necklace using the byzantine weave. Made from anodized aluminum in green and black, it will not tarnish and is lightweight. The 20 sided die is a transparent green with white numbers. There are 5 different necklace lengths to choose from, each size has a 2 inch extender chain (so the 16 inch size adjusts between 16-18 inches and so on). Lobster clasp.