1 nm =10^(-9) m =10^(-7) cm =10(-6) mm du=0.001 micron.
1 m =100 cm, 1 cm =10 mm, 1 mm =1000 microns.
It follows that:
2nm=2 x 10^-9 meters = 0.000000002 meters
A two-nanometer chip is about a hundred square millimeters.
There are no two-nanometer chips yet. The size of the chip is basically designed according to space constraints, such as computer chips are not sensitive to space requirements, so the size is far larger than the smartphone chip. High-end smartphone chips are currently processed with 12-inch wafers, and the size of the current 4 - and 5-nanometer chips is also about 100 square millimeters. So the two-nanometer chip is also the same size specification.