Smallest bone
- Who
- Unknown
- What
- 2.6 - 3.4 millimetre(s)
- When
- 01 January 0001
The stapes or stirrup bone, one of the three auditory ossicles in the middle ear, measures 2.6-3.4 mm (0.1-0.13 in) in length and weighs from 2 to 4.3 mg (0.03- 0.066 grains).