The world's smallest Christmas card has been created by British scientists - 200 million times smaller than a stamp.
The tiny card, which is 15 microns by 20 microns, even includes an intricate inscription of a snowman and seasonal messages - despite being too small to see with the naked eye.
It was created by scientists at the National Physical Laboratory in Teddington, south west London, who say it is ten times smaller than the previous record holder. A micron is the equivalent to one millionth of a metre.
The card, made on a silicon nitride membrane has a coating of super-expensive platinum, which is worth 0.000002p.
While the card is a fun way to mark the festive season, it also showcases the progress being made in materials research on this scale. We are using the tools that created the card to accurately measure the thickness of extremely small features in materials, helping to unlock new battery and semiconductor technologies. It's a genuinely exciting development that could help to make new technologies and techniques a reality.
The card is so tiny, about seven quadrillion of them could fit into an average post box - which is 900,000 cards for every person on earth.