The World’s Smallest Christmas Card

It’s the little things that make Christmas special, and with this in mind, National Physical Laboratory (NPL), the UK’s National Measurement Institute, has created the world’s smallest Christmas card.

Measuring in at 15×20 micrometres in size, you could fit over 200 million cards in a single postage stamp by volume.

The card requires a powerful microscope just to see it, let alone read the festive message inside.

To make the card 10cm in height, you would have to magnify it 5000x; equivalent to blowing up a postage stamp to the size of a football field.

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