I purchased the 3-tab shingles in slate gray for a scratch built structure I’m building. It took a couple of weeks to fill the order & arrive. I started installing them on the structure. I find them easy to work with & excellent quality. They are strong for laser cut paper type material. I thought that the sheets seemed relatively small (3.5” x 6”) in size, although there are four sheets per pack. It would be easier to estimate material if you'd please just state the size. I’ll order more of this product in the future to finish the project. Thank you for a nice product. Larry H.