Well duh, considering it was modeled with the Pyro's head proportions in mind.
Sorry, just kind of irked that every class except the Spy has had a community item put in the game for them. The fact that the mask for the backstabbing, cloak-using, sneaky assassin-type character in SMNC was given to the Pyro was basically an added kick in the dick.
::EDIT::
Oh, apparently the SMNC people had their OWN version of the mask which was going to go to Spy and Scout. But apparently Valve stepped in and made a version of their own...and gave it to the Pyro.
Someone at Valve must reeeeeeeally dislike Spies.
I thought they would get fire for that seeing as Gabe's favorite class is the spy