Let your children learn numbers and letters through play with the Trademark Foam Floor Alphabet Number Puzzle Mat. which features 36 colorful 12 x 12 foam tiles including 26 pop-out letters and 10 pop-out numbers. The versatile tiles interlock allowing flat or three-dimensional building fun and the 0.25 thick foam provides a safe and soft play surface for both indoor and outdoor fun. 36 Foam Tile Pop Out numbers and Letter Safe surface for indoor and outdoor use Covers 36 square feet including border Foam pieces are easy to interlock and provide a safe and cushioned play surface Product Dimensions: 72.5 x 72.5 x .25