speck; tiny dot; grain-sized thing
Literally 'bean grain'; used for something very small, like a speck or a tiny dot, often in comparisons.
People in the distance look like specks.
Even a speck-sized scratch bothers me.
pea-sized; very small
Compound of 豆 (bean) and 粒 (grain), literally 'bean grain'. The exact historical derivation is uncertain, but the meaning is transparent from its components.