A specialist medical camera that measures just 0.65 x 0.65 x 1.158mm has just entered the Guinness Book of Records. The size of the grain of sand, it is the camera's tiny sensor that is actually being entered into the record book.
The OmniVision OV6948 is just 0.575 x 0.575 x 0.232mm and produces a 40,000-pixel color image using an RGB Bayer back-side-illuminated chip. Each photosite measures just 1.75 µm across.