What Is The Smallest Marked Metric Unit On A Meter Stick What Is The Smallest Marked Metric Unit On The Meter Stick, Vernier Caliper, And The Micrometer Caliper?

What is the smallest marked metric unit on the meter stick, vernier caliper, and the micrometer caliper? - what is the smallest marked metric unit on a meter stick

On the caliper, please give me the smallest item of the two parameters of the old and new calipers.