19mm(diameter)×60mm(length) In 1971, when ABARTH joined the FIAT Group, the company's CI was changed and the emblem design was also updated.
This key ring is a vintage key ring from that time that imitates the revamped emblem.
It's more like a charm than a key ring, and is recommended for people who don't like too much clutter.
Having said that, as it is a vintage item, it might be best to keep it as part of your collection?