Summary of tennis ball properties
| Type 1 (fast) | Type 2 (medium)* | Type 3 (slow)† | High altitude‡ | |
|---|---|---|---|---|
| *This ball may be pressurised or pressureless. The pressureless ball shall have an internal pressure that is no greater than 1 psi (7 kPa) and may be used for high altitude play above 4000 feet (1219 m) above sea level and shall have been acclimatised for 60 days or more at the altitude of the specific tournament. | ||||
| †This ball is also recommended for high altitude play on any court surface type above 4000 feet (1219 m) above sea level. | ||||
| ‡This ball is pressurised and is an additional ball specified for high altitude play above 4000 feet (1219 m) above sea level only. | ||||
| §The deformation shall be the average of a single reading along each of three perpendicular axes. No two individual readings shall differ by more than 0.030 inches (0.076 cm). | ||||
| Weight (mass) (oz) | 1.975–2.095 (56.0–59.4 g) | 1.975–2.095 (56.0–59.4 g) | 1.975–2.095 (56.0–59.4 g) | 1.975–2.095 (56.0–59.4 g) |
| Size (inches) | 2.575–2.700 (6.541–6.858 cm) | 2.575–2.700 (6.541–6.858 cm) | 2.750–2.875 (6.985–7.303 cm) | 2.575–2.700 (6.541–6.858 cm) |
| Rebound (inches) | 53–58 (135–147 cm) | 53–58 (135–147 cm) | 53–58 (135–147 cm) | 48–53 (122–135 cm) |
| Forward deformation (inches)§ | 0.195–0.235 (0.495–0.597 cm) | 0.220–0.290 (0.559–0.737 cm) | 0.220–0.290 (0.559–0.737 cm) | 0.220–0.290 (0.559–0.737 cm) |
| Return deformation (inches)§ | 0.265–0.360 (0.673–0.914 cm) | 0.315–0.425 (0.800–1.080 cm) | 0.315–0.425 (0.800–1.080 cm) | 0.315–0.425 (0.800–1.080 cm) |