Tennis polo
The sport is played on a grass field between 80 and 100 yards long and 50 to 65 yards wide. The goal area is a semicircular line with an 11-yard radius and the penalty mark at 13 yards from the goal. An experimental rule has a second semicircular line on the field with a 17-yard radius. Generally, a field for gridiron football or soccer can be used.
Yard
The yard is used as the standard unit of field-length measurement in American, Canadian and Association football, cricket pitch dimensions, rugby union, rugby league and in some countries, golf fairway measurements.
There are corresponding units of area and volume: the square yard and cubic yard respectively. These are sometimes referred to simply as "yards" when no ambiguity is possible, for example an American or Canadian concrete mixer may be marked with a capacity of "9 yards" or "1.5 yards", where cubic yards are obviously referred to.