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. Set of 200..Recommended Age Range: 3-14 years.Subject: Math.Size: 1" each.Magnetic Counters.Dowling Magnets products are a great addition to any classroom!