Go Game 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 as a vinyl roll up Go mat for the traveling player.
Lastly if you are eco conscience there is a bamboo board that you will find works very well.