no, nfl footballs are a little larger than ncaa footballs
When did the NFL and the AFL start using the same size footballs
The NFL only uses one size of footballs. And that is "Official Size" or "Sunday Size".
They use them for practice.
They are filled with air
A football is 11 inches long, so a little bit over three footballs are in a yard.
The NFL's official footballs are only made at the Wilson Football Factory in Ada, Ohio.
Yes. Another difference between them that I know of is that pro-footballs don't have white lines and high school footballs do.
they sign it with a marker
No, just air.