> big guy has high AC so bigger person is harder to hit with an arrow than small one I'm not aware of any version of D&D where just being bigger makes you hard

> big guy has high AC so bigger person is harder to hit with an arrow than small one I'm not aware of any version of D&D where just being bigger makes you harder to hit. In the current (5th edition), I believe size has no effect on chance to hit. In some earlier editions, being bigger makes you easier to hit, and being smaller makes you harder to hit (e.g. 3rd edition: https://www.d20srd.org/srd/combat/combatStatistics.htm https://www.d20srd.org/srd/combat/combatStatistics.htm).