A "European pillow" is 26" x 26". An American pillow is 20" x 26" (standard size). The round bolsters, found extensively in France but less often in Spain, may be as much at 40" long and about 8" in diameter. I made the pillow pocket to accommodate the French bolster pillow, and the others fit into it with a little extra material at each end. I like the pocket because it keeps my head from contacting the pillow, but keeps the pillow at the top of my sleep sack. A treatment of the entire thing with permethrin, and it is bedbug-proof, under three ounces, and water repellent. It adds about 10 degrees (F) of warmth. My permethrin treated soft Tyvek blanket (48" x 80") is another four ounces, and adds another 10 degrees of warmth. After that, I need an albergue blanket, whose germs and bedbugs are kept away by both the Tyvek and sleep sack ...