the hitbox is actually bigger then the animation already, and yes I think Zelda’s animation has a larger swing (possibly bigger then my bigger hit box).
That is one thing that is hard to test yourself, as you start to internalize the ‘perfect’ time to swing the weapon.
the hitbox is 2 tiles wide and 1.5 deep offset a 1/2 a tile in the direction your facing (so roughly 1/2 a tile above and below the character if attacking left/right). I think I would be up to increasing the size of weapon in the animation and increasing the hitbox if I continued working on the game.