Definitely in meters.
If you mean measure height then it would be the metre if you mean measure weight it would be Kilograms
You would use meters.
I would use meters.
Meters for height Kilograms for mass.
yards or meters
decimeters
meters
I would use Meters
A door is about 2 meters, but most likely you'd measure in centimeters.
You would use meter's to measure an oak tree's height.
Meters.
Metres (American spelling = meters), unit symbol "m", would be the most appropriate metric unit to measure the height of a 32-story building.