Topic summary
Endzone

Extracted from the Wikipedia article End zone.
Size
The end zone in American football is 10 yards long by 53+1⁄3 yards (160 feet) wide. A full-sized end zone in Canadian football is 20 yards long by 65 yards wide. Prior to the 1980s, the Canadian end zone was 25 yards long. The first stadium to use the 20-yard-long end zone was B.C. Place in Vancouver, which was completed in 1983. The floor of B.C. Place was (and is) too short to accommodate a field 160 yards in length. The shorter end zone proved popular enough that the CFL adopted it league-wide in 1986. At BMO Field, home to the Toronto Argonauts, the end zones are only 18 yards. Like their American counterparts, Canadian endzones are marked with four pylons.