I'm not sure if it's cotton... I couldn't measure everything because it's too much trouble. I don't know because the measurements are cut straight, so I've written them a little shorter. Patchwork or something for the necessary amount? There are parts that have been cut out. I've measured the parts that have been cut out in a rectangular shape. I've ignored the jagged cuts. Example of cut-out parts: Image 14 It's a large set. Does it include Michael Miller, etc.? My family collected about 3 boxes of these in a storage case. My family is neat, so I think they've been stored neatly. I'm measuring randomly. Please ask if you have any questions, as I will measure about 5 that you're interested in! These are not small scraps. The edges are amateur cuts, so there may be loose threads or jagged edges. They might have been cut? Are there threads attached? I haven't been able to spread everything out and look at it, but the fabric itself looks clean as far as I can see. Image 15 is small.