Double-sided--just flip them over! Magnetic manipulative is so versatile. Great for teaching counting and cardinality, operations, base-ten concepts, and more. Feature flexible magnet material and red/yellow colors to match counters in the most popular math programs. Measure 1 each. Ages 3+/Grades PreK+. Each pack includes 200 counters. Sold as 3 packs for a total of 600 counters.