ETA hand2mind Double-Sided Geoboards (Set of 10) Build shapes, measure area, explore perimeter, and practice symmetry Includes 10 plastic geoboards in 5 colors (red, blue, green, yellow, and purple) and rubber bands One side has 5 x 5-pin grid with coordinates and 12 pin circular pattern that includes radius and diameter pegs on the other Geoboard measures 7.5-inch Easy to use and durable enough for students at home or in the classroom