These color-coded cards provide students with a visual representation of place value and help them develop number sense. (Color-coding matches Sensational Mathâ Place Value Discs) The cards are all 4″ high and range in length from 2.5″ to 17.5″ depending on place value. Each set is packaged in a zip-lock bag for handy storage. 10 each of 7 values is1, 10, 100, 1,000, 10,000, 100,000, and 1,000,000. 70 cards total.