This Large Tens Frames Magnetic set is the perfect tool for teachers to demonstrate the concept of tens frames. It contains four frames that each measure 15 x 36cm, and come with 5 red and 5 yellow magnetic counters (4cm in diameter). With a total of 4 frames and 40 counters, this set is ideal for the classroom. It also works perfectly with the Large Magnetic Bi-Colour Counters to help bring the concept of tens frames to life.