Geoboard (transparent) 11x11 Flat Head Peg Grid This Transparent Geoboard has 11 x 11 peg grid. The total number of peg is 121. Knobbed pins holds rubber bands. This Geoboard is primarily used in the exploration and recognition of shapes, designs, spatial relationships, angles, fractions, area, perimeter, symmetry, and coordinates.It can also be used on overhead projector also.Provided with 10 rubber bands. Measuring 23cm x 23 cm.