5 players per side on the field (some states 7-on-7); Roster size typically 12-15 players per team; Substitutions: unlimited between plays
Why people argue about this
People often assume that in NFHS Flag Football, each team must always have exactly 5 players on the field at all times during a play, which leads to arguments about substitutions or changes in formation. However, the actual rule allows for unlimited substitutions between plays, so teams can adjust their formations and numbers as needed without violating any rules.