The 'International' size court was codified in the 1920s at 32 feet (9750 mm) long and 21 feet (6400 mm) wide. The front wall has an 'out' line 15 feet (4570 mm) above the floor, connected by a raking 'out' line meeting the 'out' line on the back wall at 7 feet (2130 mm) above the floor. The front wall also has a 'service' line 6 feet (1830 mm) above the floor with the 'tin' (the equivalent of a net) 17 inches (430 mm) high surmounted by a 'board' a further 2 inches (50 mm) high. The floor is marked with a transverse 'half-court' line and further divided into two rear 'quarter courts' and two 'service boxes', as shown in the diagram above.
The traditional 'American' court for the USA game, (now referred to as 'hardball squash') is a similar size, but narrower at 18 feet 6 inches (5640 mm). The floor and wall markings differ slightly from the 'International' court and the tin is lower, at 15 inches high.
A 'Converted Court' is the result of converting racquetball courts to squash. Racquetball courts are 20 feet wide and 40 feet in length, so it is relatively easy to install a back wall, producing a squash court of 20 feet wide by 32 feet in length.