- Beijing Dexian Technology Co., Ltd.
- China (Beijing)
The smallest QR code is 2,352 μm² and was achieved by Beijing Dexian Technology Co., Ltd. (China) in Beijing, China, on 18 September 2020.
The challenger put the QR code on the surface of a diamond. The idea is to allow people to store valuable memories, like photos, videos into these QR codes and send these tailor-made jewelries as gifts to their friends, lovers, parents, etc. Embedded QR codes will make these gifts unique. As these QR codes can't be seen by naked eyes, the product set that will include a portable amplication equipment. As a comparison, the diametre of a hair is about 80 μm.