BBC Sport explains the regulations around the size, weight and dimensions of footballs, and how much these can vary.

Kipsta balls in the Europa League and Puma balls for the EFL Cup. In response to Guardiola's comments, a Football Association spokesperson said: "Mitre's Ultimax Pro ball - used in the Emirates FA ...

and Puma balls for the EFL Cup. In response to Guardiola's comments, a Football Association spokesperson said: "Mitre's Ultimax Pro ball - used in the Emirates FA Cup and all other FA competitions ...

Nike balls are used in the Premier League, with Adidas balls utilised in Uefa's European competitions, and Puma balls for the EFL Cup. In response to Guardiola's comments, a Football Association ...

The Manchester City coach's comments came after his side's 3-1 FA Cup victory over Plymouth, where City had 20 shots off target, highlighting his frustration with the Mitre balls used in the ...

Nike balls are used in the Premier League, with Adidas balls utilised in Uefa's European competitions, and Puma balls for the EFL Cup. In response to Guardiola's comments, a Football Association ...

It’s difficult to control it and it does whatever it wants. Many years, many players and managers talk about that’ ...