I love Scrabble and am making a custom Scrabble board on wood. I needed the exact dimensions of the regular board and made up these images to help me. You can flip the images and print them backwards and create a paint on image transfer medium. Available at 'michael's craft stores'. These 4 pages are 8"x10" and can be printed on your printer. You can then match them up and assemble them. This is the exact dimension of the regular scrabble board that came in my game box. It fits regular wood tiles. You can also print out your own tiles (images found here), or make your own tiles from small pebbles, glass tiles etc.
