Sorry for late reply. I make the mats out of two pieaces of fleece which is 100% safe for guinea pigs. I also do padded mats they have wadding in the inside of them. So if your piggy chews things they are not the greatest things to have. I make them to fit the cage. Depending on what size you want depends on the price. The standard size is 24" square. You can email me email@example.com for more details. Thank you for your interest.