This plastic rug protector was the exact size as advertised. It fit perfectly into the well where the previous rug protector was. The chair glides smoothly over it.
Although my carpet doesn’t have a deep pile the pad must be deep. The chair sinks into the mat creating dents and making it difficult to roll. If you are putting this on carpet I recommend getting the heaviest duty mat.
This is my second chair mat from Staples. I have totally worn out the first one. I LOVE this mat because it helps the chair slide so easily in a room with carpet. Terrific product!