This website might help you: http://www.madehow.com/Volume-3/Football.html The NFL's official footballs are made of premium cowhide leather. According to the NCAA, college teams also use leather footballs, but they're a little bit smaller than NFL balls.
CowHide (I am not positive on this but I think it is)
Yes, high school footballs are smaller and usually have two white stripes (NCAA regulation) near the ends.
no, nfl footballs are a little larger than ncaa footballs
A lot of them are made in Canada but the ones you would buy are made in Canada and Russia.
The standard football is a size 5-6 inches. An NCAA football is smaller than the NFL ball as it is only 5 inches while a NFL is 5.5-6.3in.
footballs are kept at 71o F
Ohio
The official NFL football is about $11.00, but you can find other footballs for a lot less expensive than that.
A football is 11 inches long, so a little bit over three footballs are in a yard.
The NFL only uses official size footballs for their games and that is their standard.
They use them for practice.