I think this pattern is great fun, but I’m just a little biased. ;)

Any worsted weight yarn should work with this pattern, but I chose RHSS for its indestructibility. The prototypes my kids have been playing with washed beautifully.

The finished gameboard is approximately 7.5 inches (19 cm) square. The Xs and Os are approximately 1.5 inches (3.8 cm) across.