All balls must be:
made of suitable material
of a circumference of between 68 cm (27 ins) and 70 cm (28 ins)
between 410 g (14 oz) and 450 g (16 oz) in weight at the start of the match
of a pressure equal to 0.6–1.1 atmosphere (600 –1,100 g/cm²) at sea level (8.5lbs/sq in–15.6 lbs/sq in)
All balls used in matches played in an official competition organised under the auspices of FIFA or confederations must meet the requirements and bear one of the marks of the FIFA Quality Programme for Footballs.
Each mark indicates that the ball has been officially tested and meets the specific technical requirements for that mark which are additional to the minimum specifications stipulated in Law 2 and must be approved by The IFAB.
National FA competitions may require the use of balls bearing one of these marks.
In matches played in an official competition organised under the auspices of FIFA, confederations or national FAs, no form of commercial advertising is permitted on the ball, except for the logo/emblem of the competition, the competition organiser and the authorised manufacturer’s trademark. The competition regulations may restrict the size and number of such markings.