YOUR TAX-DEDUCTIBLE CONTRIBUTION PURCHASES THIS ITEM FOR OCS - THANK YOU! Fraction concepts are easy to understandwith realistic magnets that provide plenty of practice! Perfect for hands-on exploration and a variety of skill-building math activities, these easy-to-use manipulatives stick to any magnetic surface. Set includes 9 color-coded fractions sets, from wholes to twelfths. Whole is 3 3/4" in diameter.