Go Game Wood Boards
There are several different types and sizes of go boards, when you are a beginner it is to your advantage to start with a smaller grid (smaller board) and as your skill level improves invest in a larger board.
There are reversible boards that feature two different grids depending on your skill level. There are also boards that provide storage for your stones as well.
Lastly if you are eco conscience there is a bamboo board that you will find works very well.