The SFA has written to all clubs in Scotland as a result of discussions between the governing body, referees and the police held in the wake of the red card shown to Hearts midfielder Phil Stamp following celebrations during the last Edinburgh derby.

BBC: Police join in player warning

But still it's got room for a Secure Digital storage card, the postage stamp-sized flash memory cards that are showing up in all kinds of electronic devices.

FORBES: Magazine Article

The cryptographic token, in development for a year at MIT's Center for Bits and Atoms, is the size of a postage stamp and as thick as a credit card.

FORBES: Magazine Article

Oakes was the victim of an unpunished punch from Simon Shaw just before his yellow card but his stamp was obvious and Wasps took advantage through Leo and Voyce.

BBC: Wasps 35-15 Newcastle

The card has an elaborate crest in its top left corner and was posted with a threepenny stamp.

BBC: Postcard puzzle solved