Section 2: Equipment

The football is governed by Law 4. It must be of symmetrical oval shape, 720-730 millimetres in circumference and 545-555 millimetres transverse circumference, and inflated to a pressure of 69 kPa (Law 4.1).

Source: Law 4, Law 4.1, Law 4.2, Law 5, Law 5.4, Law 5.3, Law 9, Law 9.2, Law 9.3, Law 9.4, Law 3.3

Send this to your friend — argument over.