Frankie Edgar vs. Urijah Faber staredown pic reveals 'Answer' to who is bigger featherweight

Frankie Edgar has dropped down from the 155-pound division to compete at featherweight, while Urijah Faber will be abandoning the 135-pound weight class -- albeit temporarily -- to meet him there.

The former champions have been paired off for a UFC Fight Night 66 main event, which takes place on May 15, 2015 at SM Mall of Asia Arena in Pasay, Philippines, airing stateside on UFC Fight Pass and FOX Sports 1 (more on their five-round headliner here).

In anticipation of their 145-pound showdown, "The Answer" tweeted a photo of his face off with "The California Kid" during a promotional appearance in Las Vegas, Nevada.

Have a look:

Me vs Uriah. It's been along time coming. Respect before the fight all business once the d... http://t.co/oNVHY4IpmG pic.twitter.com/wb2uVFGtek

— Frankie Edgar (@FrankieEdgar) February 17, 2015

Will size matter on fight night?

Both competitors are lightning fast with outstanding wrestling and superior footwork. That means fans can expect an electric 25 minutes of mixed martial arts (MMA) action on fight night ... unless someone finishes it early.

Whose side are you on?