13x13 and 9x9 are the common smaller boards, standard for teaching and fast games (AGA Rule 1); On boards smaller than 19x19 a non-integral komi should still be used, since avoiding a drawn game is part of the spirit of the AGA rules
Why people argue about this
People often assume that smaller board sizes like 9x9 mean komi should be eliminated entirely, forgetting that AGA rules mandate a non-integral komi for these boards to prevent draws, even though they're smaller than standard. This oversight leads to misunderstandings about how the spirit of the game is upheld on these boards.