Build visual representations of place value. operations. Fractions. Decimals. percent. and more! set of 62 student-size base ten magnets (all Yellow) includes 2 flats. 20 Rods. and 40 units in a poly bag. Each flat is 4.13 inches long x 3.75 inches wide. Ideal for individual or small Group student use on a magnetic lap board (not included). made of flexible magnet sheet. Usage tips: use care when removing die-cut magnets from their magnet sheets before first use. Storage: store flat and away from high heat and direct sunlight.