Each card is 3 inches x 3 inches and has a strong magnetic backing so little hands can't knock them off - therefore, they are truly used as a communication system! All cards are based on a color-coded system (Fitzgerald Key) to enhance carryover for AAC users. They are designed for children of varying abilities — including early language learners, children with language delays, AAC users, and non-speaking individuals. This system embraces a total communication approach!