How long do you think a jr. high football field would be?

Hello, so I'm not a sports person, I'm a guy and I don't know how to play football, and for some reason no one can explain it to me (they've tried). Although there is one sport that I like, Capture the Flag. I was going to get some friends together to play a game at my jr. high's football field, and I was just wondering what the dimensions might be. I know that the sizes of fields can differ.|||100 yards (120 including the endzones) long %26amp; 53 1/3 yards wide.|||From field goal post to field goal post it's 120 yards and including the sidelines it's probably near 50 yards wide.|||reg playing field size, 100yds by like 53 1/3|||100 yards long and 55 yards wide. Just like any other real field