The board is 29 1/4 inch long by 18 1/4 inch wide by 1/4 inch thick plexi-glass. The traces are 1/32 inch wide and 1/16 inch deep. The 26 small holes in the top right go all the way through the board and are 1/32 inch in diameter. The larger holes are 3/16 inch deep and 1/4 inch in diameter.