A tape measure.
The only reason that I can think of is that you want to communicate with a person who is not familiar with the English system - football rules measure the field in yards or feet, so square meters is an unnatural measure for them.
Neither. I would use a centimetre.
You should use a meter stick to measure the length of a soccer pitch.
on the foot ball field
the American football field is 100 yards by 50 yards.
3 points for a field goal in American Football
Click on the 'American Football Field Diagram' link below to see a diagram of an Amerian football field.
In American football, it is 100 yards long.
the measure of a half of a football field
Lenght of osu football field is generally measured in square meters.