Original: American handball is played on a court with either a single (front) wall, three walls, or in a fully enclosed four-wall court (the most common).
Simplified: American handball is played on a court 12.2 meters long by 6.1 meters wide (40 feet long by 20 feet wide) with either a single (front) wall, three walls, or in a fully enclosed four-wall court (the most common).