Answer:
Centimeters
Step-by-step explanation:
It would be most suitable and appropriate to use centimeters when measuring a shoe because the size of centimeters helps us to avoid excessive amounts of decimal points and 0s.
E.g. The average shoe length is just under 25cm which would be 0.25m, 0.00025km, 250mm and 0.0025 hectometers. The relative size of cm to shoe means the number is short and easy to read without extra zeros and decimal points.
Hope this helped!