millimetres (or tenths of millimetres, if you have a micrometer)
Metres.
a tape measure
pounds
A millimetre.
meters
It depends on the width of the desk. You could use centimeters or meters.
Feet
It is a metre.
barman curls -2
In liters
Metres.
the metric system
Mililiter
mg
mm, cm or m.
Milligrams.
A millimetre.