Footballs are usually inflated to 13 psi. I've seen junior footballs that were supposed to be inflated to 7.
For an Association football, 8-12 psi. For an American football, 12.5-13.5 psi. For an Australian football, 9-11 psi.
9.0-11.0 psi - [Ref. "Football (ball)" - Wikipedia]
A football used in a professional match within the UK should be inflated to 12.5 PSi exactly.
Official FIFA soccer balls must be inflated to 12.5-13.5 pounds per square inch.(PSI).
13 p.s.i.
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7.5 to 8.5 psi
The Kappa Alpha Psi fraternity doesn't have an official mascot. In the past, the playboy bunny has been associated with this fraternity. However, this is not their official mascot.
The pressure inside a football is caused by the air particles inside the ball being compressed by the addition of increasing amounts of air. The standard PSI of a professional football is 13 psi (Pounds per square inch).
13 psi
Footballs are inflated to 13 pounds per square inch (psi).