1 Single Piece is 30 x 30 x 1 CM. When all Puzzle Mats are attached 16 Pieces will become 120 x 120 x 1 cm (perfect square) or 90 x 150 x 1 cm or 60 x 180 x 1 cm (rectangle), it can form into any shape as required. A Great addon to add to the Baby Gym Mats, is just to place it underneath your baby activity gym mat and make it thick enough for babies to play it safe by ensuring the Aussie baby can move freely without worrying about the hardness of the surface. Baby Puzzle Mat Product Dimension: 1 square comes as 30 x 30 x 1 cm , 16 Pieces = 120 x 120 x 1 CM (comes with Zip lock Bag for easy storage) 24 Pieces = 120 x 180 x 1 CM (comes with Small Quilt Storage Bag for easy storage) 1 CM thick or 0.4 inches thick Benefits of Foam Play Mats Light Weight, Soft, Thick, Non-Toxic Foam, Covers a wide area as per the variant selected Helps build up Physical, Cognitive and Emotional Skills for newborns Improves Gross and Fine Motor Skills Encourages Family Time Protect from Hard surfaces making it a safe environment for kids and toddlers to move freely Foam Play Mat Multi-usage: Can use it as a mat for yoga and exercise It will fit inside a tent to feel soft and comfy (which can be used during camping and hiking) Pets love it and the playmats make them comfy with a big space to lie into and support every crazy way a pet can sleep <