Features: Conveniently track your math calculations with this set of 20 acrylic counters. Perfect for math lessons and recreational activities. Made from acrylic, these counters are durablity and reusable, ensuring long lasting use. Suitable for students, teacher, and individuals who need to perform math calculations or enjoy playing game. These counters are perfect for educational settings, homeschooling, math tutoring, and recreational venues. Whether in a classroom, indoor, or in a recreational venue, these counters will add convenience to your math lessons or game session. Specifications: Material: Acrylic Size: 16mm/ 0.63in Type: 1, 2, 3, 4 Package Includes: 20pcs/pack Kids Mathematics Learning Dices Toy note: 1: Please allow 1-2cm errors due to manual measurement, make sure that you not mind before you order. 2: Due to the different between different monitors, the picture may not reflect the actual color of the item.