There is no edge and it cut crooked; with that the chair rollers pick up the edge of the mat and will not go on it. Waiting to return it but I don't have the receipt.
I liked the size of the mat as most of the others available are too large but the quality was poor. There are already indentations from my office chairs's wheels and I've only owned the mat for a week.
I waited a long time to replace an old cracked floor mat. Having this new one is a pleasure. It's smooth and durable and makes it easy to move in my chair despite the plush carpet. Recommended.