Thunder Group PLBM0804S 4-3/4" x 8-3/4" Flexible Non Stick Silicone Baking Mat

Pros: Durable Easy to clean Appears well made Cropped corners to fit inside pans with slightly rounded corners (which is most of them)

Cons: About an inch too narrow, so doesn't cover the surface of an eighth sheet pan (I admit I may be missing the point, so perhaps that's not what it's made for? If not, lost opportunity then...)

The looks great, works perfectly, cleans easily, and is comparable to the name brands. The only downside--and it's a relatively big one--is the size. It's not that it doesn't measure exactly what the description says--it does! And perhaps I'm not aware enough of pan sizes, but it seems like an odd shape to me. I figured it would fit an eighth sheet, and while the length dimension is a perfect fit, and the cropped corners are a wise move, the width is about an inch or so too narrow.