What size backboard should I get? We carry backboards that range from 48″ wide up to 72″ wide. The most common backboards are rectangular, which is what the NBA and other major basketball teams use. The NBA and NCAA use regulation backboards that are 6 feet (72″) wide by 3.5 feet (42″) tall. Generally, we recommend choosing a backboard that is at least 54” wide as bank shots are impossible on anything less. However, smaller backboards save on space and might be the best option for slender driveways.