ProSource Kids Puzzle Alphabet, Numbers, 36 Tiles and Edges Play Mat, 12" by 12" 36 foam pieces with removable letters and numbers and 24 border pieces.Made of high density EVA foam 10mm (3/8 inch thick) Each square is equivalent to 1 Sq.ft, for a total coverage of 36 Sq.ft (6' x 6' area) Bright primary colors to stimulate your baby's early child development Safe, soft and durable. This item is not recommended for use on carpets. For ages 3 and up Easy to use and easy to clean. EVA foam is free of toxic phthalates and creates a soft, comfortable floor for your child to play Protective Flooring High density, durable foam provides protection for your child in areas with wood or tile floors