I haven't played before but I think you can play with 2 or four players. I made it out of some 1/2 in scrap oak plywood I had left over. The PVC is 4 in. and epoxied in the box before I put the felt in the bottom. I ordered washers that are coated specially for washer toss games from Amazon. They were 2 1/2 in. and you received four of each color.