The squares are 22mm by 23.5mm with a standard 9x9 grid. I printed my pieces in white and red as I liked those colors. I tried to design it to be as ergonomic as I could while using a fairly small amount of filament. The most expensive part of this model is the GO pieces as you need roughly 50 pieces for each side in order to make sure you don't run out. The file is set to print out 25 pieces for each side. It took me a good half-roll, and that's about $12 for me. I saw most of the GO boards on Amazon going for $50, which is what inspired me to make this version.