The Waterproof Gardening Plant Repotting Mat is a blue, one-piece plant transplanting mat designed for indoor gardening. With its waterproof feature, it helps control soil mess and makes repotting plants a more manageable task. Perfect for all seasons, this mat is ideal for protecting floors and surfaces from dirt and debris when working with indoor plants. Easy to use and clean, it is a practical addition to any indoor gardening setup. Been making these for years now and use it too. Corners fold up and attach with Velcro. Measures 24 by 30. buyer has choice of color. But one or all 3, they make great gifts and you can save on shipping.