This 40x60 mat covers my entire fabric cutting table. I LOVE it! Before, I had a small old chipped mat that I had to move around in order to cut out an entire garment. Now, I can lay out the entire pattern and cut it without moving anything! The white mat with blue lines is perfect for altering patterns, since I can easily see the grid lines through my pattern tissue. The mat arrived rolled. I laid it out on my table overnight, and in the morning it was perfectly flat. All pros - absolutely no cons. Happy customer! I wish I had purchased this years ago!