Educational Tool: This set of 100 dual color round counters is a great educational tool for children, allowing them to learn while playing. It's an aid for teaching and learning mathematics.Portable: Math counters with storage box is portable and easy to carry.Quality Material: Made from durable ABS material, counting chips are designed to withstand long term use . Size: With a diameter of 25mm and thickness of 3mm, these counting counters are perfectly sized for little hands to grasp easily, enhancing their fine motor skills as they play.MultipurposeBingo chip counting discs markers for math practice,suitable for adding, subtracting and counting, bingo, math learning, sorting, teaching tools for classroom or home. Size Chart: Diameter:2.5cm/0.98inchDiameter:0.3cm/0.12inch Package Includes: 100 Bingo Game Chips1 Storage Bucket Note: Please allow slightly errors due to manual measurement and different monitors.