R 1-2-1
The ball shall be made of four panels of pebble-grained leather in natural tan color with eight equally spaced lacings and new or nearly new with no alterations.
The ball shall be an ellipsoid spheroid of regulation dimensions and inflated to a pressure of between 12.5 and 13.5 psi (0,85 – 0,95 bar).
| Dimensions | Regular | Youth | Junior |
| Length | 11.00 to 11.50 inches | 10.50 to 11.00 inches | 10.25 to 10.75 inches |
| (27,9 – 29,2 cm) | (26,7 – 27,9 cm) | (26,0 – 27,3 cm) | |
| Length circumference | 27.00 to 28.00 inches | 26.00 to 27.00 inches | 25.00 to 26.00 inches |
| (68,6 – 71,1 cm) | (66,0 – 68,6 cm) | (63,5 – 66,0 cm) | |
| Diameter | 6.25 to 6.75 inches | 6.00 to 6.50 inches | 5.75 to 6.25 inches |
| (15,9 – 17,2 cm) | (15,2 – 16,5 cm) | (14,6 – 15,9 cm) | |
| Cross circumference | 20.00 to 21.00 inches | 19.00 to 20.00 inches | 18.00 to 19.00 inches |
| (50,8 – 53,3 cm) | (48,3 – 50,8 cm) | (45,7 – 48,3 cm) | |
| Weight | 14 to 15 ounces | 12 to 13 ounces | 11 to 12 ounces |
| (400 – 425 g) | (340 – 370 g) | (310 – 340 g) |
Each team may use its own legal ball. Marking a ball to indicate ownership is legal.