Key ID format: short or long?

[Robert J. Hansen]

Faramir wrote:
> I was thinking... in case I want to put my key ID in a business card,
> what format should I use? Short format (8 characters) or long format (16
> characters)? With or without the '0x' prefix?

Put the entire key fingerprint on the card.  That way, if you give
someone a business card, you're also giving them a known good copy of
your key fingerprint.

Yes, the entire fingerprint does fit on a standard business card; I have
 one of my key fingerprints on mine.