tinytokens:

The steel version of my design for a d20 locket also works very well as a key chain. I’ve been using one this way for the past few weeks now to always have a d20 at hand in case of an emergency D&D session :).

This design fits a standard 20 mm d20 as found in most polyhedral dice sets, but a larger version that fits a spindown d20 for Magic: the Gathering is also available.

For more information see my website at www.tiny-tokens.com or my Shapeways shop at www.shapeways.com/shops/tinytokens.