IRB Regulations state that a pitch shall be:
No longer than 100 metres from goal line to goal line with an in goal area no longer than 22 metres. The width shall not exceed 70 metres touch line to touch line
4.125 acres.
There are two uprights.
In rugby union-30, 15 a side
on the rugby field on the rugby field
All Blacks or any other Rugby team, requires only 15 players on the field.
2.56 acres (US)
for rugby league it is 13 players and for rugby union it is 15 players
One whole field with some room left over.
There are 100 yards in a football field because football is based off of Rugby and a rugby field has 100 yards.
15 on the field with 7 substitutes on the bench.
There are 15 players from each team on the field during a rugby union match.
In Rugby Union: 30 + 1 referee + 2 assistant referees = 33. In Rugby League 26 + 1 referee + 2 touch judges/linesmans = 29.