Each one of these Keva Plans are identical sized, but are unique in the grain of the maple wood. Beautiful pieces are wonderful to build countless buildings and structures. If you need other building ideas you can consult the included book that gives not only building suggestions, but also tips, projects, photos, and activities. These planks measure 4 1/2 inches long by 3/4 inche wide, and 1/4 inch thick. These are fun for ages 5 to adult. Great coffee table "toy".