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. Child safety tested for ages 5+/grades K+.