The length goal line to goal line is 100 meters and from touch line to touch line its 69 meters. Both sizes are regulated by the IRB.
69
Perimeter = 100 + 69 + 100 + 69 = 338 metres.
Rugby
5
No more than 100m in length and 68m in width. However for junior players this may be less.
The dead ball area on ANY rugby pitch must not exceed 22 meters - measured from the goal line. This is a requirment of NRL and IRB.
Rugby pitches go up to 100m in length, so it would be the length of two rugby pitches.
A Rugby Ground normally refers to the playing area, changing rooms and any associated ground area. The playing area is called a rugby pitch
rugby pitch
Under IRB rules it may NOT exceed 100 meters goal line to goal line with an in goal area of no more that 22 meters behind each post. The pitch cannot exceed 70 meters touch line to touch line
Stadium or on a rugby pitch. The pitch will refer directly to the playing area
A rugby field is 100 metres long from score-line to score-line, whereas an nfl field is 100 yards from score-line to score-line. 1 metre = 0.91 yards, so... Rugby Field: 100 Metres NFL Field: 91 Metres