This large and very versatile geoboard is 9.5 x 9.5 inches and has a 11 x 11-pin double sided grid side that allows for a spacious four-quadrant grid to be created with a center origin or use the subtle embossed numbers to work in one quadrant only. Use the staggered 3/4" isometric array to form shapes such as equilateral triangles or regular hexagons. Each board includes its own resealable bag of rubber bands in assorted colors. Colors may vary.