Perfect for classroom demonstration or for individual use on metal whiteboards, dry erase boards, paddle boards and more. Provides an excellent tool for counting and sorting, and can model concepts from sorting to probability. Made of high quality EVA foam material. Perfect for individual, small group, or whole-class demonstration on any magnetic surface. Provides a tactile and visual model of key math concepts, including sorting, patterning, counting and other math concepts. Durable and light weight these foam, magnetic counters emulate the original plastic counters and best of all they're two-sided. Set of 200. Individual counters measure 1" in diameter and 1/4" thick.