NFHS Rules - Roster Limit

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The rule #7 talks about the roster and only states that a complete and accurate roster must be submitted before the 10 minute remaining mark of the warm-up period, and that an accurate line-up must be submitted before the 2 minute remaining mark of the warm-up period.

There is no limit on the number of rostered players, but the limit on number of players used would be 25 (6 starting players, 1 libero, and 18 substitute players) per set.

There is no limit on the number of players on bench as long as they are on the roster.