It says "10-foot square" so 2X2 sounds right. 4x4 would be a twenty foot square.
Here's a weird interaction question.
grants a bonus on saving throws against dragons breath to allies equal to the bonus from your aura of courage when in your aura of courage.
Fair enough, makes sense.
But here's where things get tricky. There is another feat, Fearless Aura
, that grants allies immunity to fear effects when in your aura of courage.
Does this mean that with for Paladin that has both feats, your allies, within the area, are immune to dragon breath effects?