square footage
inches
A common house fly is a very small animal. In order to get an accurate measurement, you would have to use millimeters.
We use grams (g) as the unit of measurement to measure mass on a triple beam balance.
Feet.
a centimeter
A shoe.
You would use CM or INCHES to measure a knife
always the meter to measure length. This is an SI (international) unit of measurment, and is the standard international unit of measurment for length.
inches
Metric tons
You can use either unit of measurement.
water in millagrams