If you're looking for a costume idea, here are some of the best! ... If you want to make your own, the original website has design specifications

Geoffrey Rush's Captain Barbossa costume from Pirates of the Caribbean 4 on display...

Geoffrey Rush returns as 'Captain Hector Barbossa' in the fourth installment of Disney's Pirates of the Caribbean, On Stranger Tides. Here's his new costume from the movie on display at ArcLight Sherman Oaks cinema on April 29, 2011.
Captain Barbossa costume worn by Geoffrey Rush
in Pirates of the Caribbean: On Stranger Tides
Captain Barbossa costume Pirates of the Caribbean 4Captain Barbossa costume Pirates of the Caribbean 4Pirates of the Caribbean 4 Captain Barbossa costumeGeoffrey Rush Barbossa Pirates 4 movie costume
Things have changed for this film and no longer is he a pirate, but instead a privateer in King George II's court and he now captains the HMS Providence.

Pirates of the Caribbean: On Stranger Tides movie poster
Pirates of the Caribbean 4 Captain Barbossa poster
Penny Rose is responsible for designing these fantastic period looking costumes. Be sure to also check out her Norrington costume from Dead Man's Chest and Keira Knightley's gown from The Curse of the Black Pearl.

Actual Captain Hector Barbossa movie costume
Captain Barbossa Pirates of the Caribbean 4 costumePirates of the Caribbean 4 Barbossa costumePirates of the Caribbean 4 Captain Barbossa costumeCaptain Barbossa outfit Pirates of the Caribbean 4Barbossa cuff detail Pirates of the Caribbean 4Pirates 4 Captain Barbossa costumeBarbossa cuff detail Pirates of the Caribbean 4Captain Barbossa On Stranger Tides costume
Captain Barbossa costume detail Pirates of the Caribbean 4
If you like this fantastic outfit, be sure to check out Geoffrey Rush's Captain Barbossa costume from The Curse of the Black Pearl.

In addition to his profession changing, Captain Barbossa has also undergone some physical changes as this slightly macabre peg leg prop attests.

Captain Barbossa's peg leg prop from On Stranger Tides
Captain Barbossa peg leg Pirates of the Caribbean 4Barbossa peg leg prop Pirates of the Caribbean 4Captain Barbossa peg leg prop Pirates of the Caribbean 4
In addition to the clothes that transform the actor into Captain Barbossa, the exhibit at the ArcLight Sherman Oaks also had some of his signature weapons on display, including his pistol and sword.

Captain Barbossa's pistol prop
Pirates 4 Captain Barbossa pistol propPirates 4 Barbossa pistol prop

Captain Barbossa sword prop
Pirates of the Caribbean Captain Barbossa sword propsPirates 4 Barbossa sword prop
Pirates of the Caribbean Captain Barbossa sword hiltPirates of the Caribbean Captain Barbossa sword hiltPirates of the Caribbean Captain Barbossa sword belt buckle
Pirates of the Caribbean Captain Barbossa sword
I love the detail on the sword hilt and belt buckle, it really was very cool to see up close.

Pirates of the Caribbean: On Stranger Tides movie poster
Pirates On Stranger Tides poster
Go further behind-the-scenes with these official books: The Art of Pirates of the Caribbean: On Stranger Tides