There are all kinds of pirates. The Red Pirate Beard and Moustache is a great start.
If you're the swaggering Jack Sparrow pirate you'll need to mess up your teeth a bit and add some pirate bling. Dirty up the nails and practice running away from your enemies.
If you're more the Black Beard type, you crave cruelty and terror, show no mercy, wield a wicked sword and strike fear into the hearts of anyone that hears you name. (He lost his head in the end so you might want to think twice about being Black Beard—especially if you get caught stealing the candy dish!)
By-the-way, this is one hairy wig. You may have to pull out an occasional bat!