Looking for a reusable math manipulative to help your student or child learn math? Our erasable, clear fact family tool will help them learn the relationships between equation components. These Math educational toys are great for any child learning addition, subtraction, multiplication, and division. Each piece is sized to easily be held by a child and allows for plenty of writing space. 7” X 7” (178 mm X 178 mm) These are made from 1/8" (3 mm) clear acrylic, and laser cut/ engraved locally in the U.S.A.