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

"But at the end that's gone - there's no way back, it's about the next game and that's our world ... EFL Cup ties so far this season. The ball in the competition is made by Puma, while the ball used ...

Different competitions have different official ball suppliers. Nike has supplied ... of a size five football - the standard for professional competitions around the world. While the dimensions ...