Soft, durable foam erasers have built-in finger grips. Works on both chalkboards and whiteboards. The attached magnet allows convenient storage right on your magnetic whiteboard. Includes 4 erasers in assorted colors: Blue, Red, Yellow and Green. Each eraser is 2.25" x 4.25". 4 erasers per pack, sold as 3 packs for total of 12 erasers. Each eraser is 2.25" by 4.25". Eraser sticks to any magnetic surface for easy storage. Works on both chalkboards and whiteboards. Age: 5+ years/Grade PK+