These are 7.5" X 10.5"... These are the stabilizer boards that comic book sellers use in their packaging. There are plastic bags the same size, and they put each comic book in one of the bags, with one of these boards behind it, for stability. A pack of 100 of these weighs several pounds, so it's not going to be cheap to ship. But this is a much cheaper alternative to the boards that are being sold to wrap fabric on. They cost something like $1 apiece, and the comic boards I bought were $.10 apiece, including the shipping. They aren't as thick and sturdy, but they take up less space and as you can see, they work fine! But... shsssssh! Don't tell the comic book dealers we quilters are using them for fabric! They might 'up' the price!