What size font are we allowed in signatures?

I see some have size 2 and others size 3. I believe I had mine at size 3 and it was reverted to size 2.

I believe the rules say size 3 but I know the rules haven't been updated in a while, so I'd like some clarification from a mod as I can't afford yet another signature infraction.

Font size allowed is 3

Just remove unnecessary bb codes and use Verdana font, no need to add font size and you will see much bigger signature