What size baseball glove does Dustin pedroia wear?

He uses a black Wilson A2k with red lacing

Dustin Pedroia, up until this year, has worn the Wilson A2K DP15. For 2012, Wilson redesigned the glove and it is now called the A2000 DP15. Both can be seen at the site What Pros Wear, and both have links to where you can purchase them.