These color-coded cards provide students with a visual representation of place value and help them develop number sense. Color-coding matches Sensational Math™ Place Value Discs. Cards are 4"H and range in length from 2 1⁄2" to 17 1⁄2" depending on place value. Includes 10 each ones, tens, hundreds, thousands, ten thousands, hundred thousands, millions. Set of 70.