Thank you for viewing. A5-size book cover with no thickness adjustment ★There is about 5mm of extra height, and there is a fold line in the center... so it's inexpensive. Used a problem book about 25mm thick during the photoshoot. Same size as GOAT Outer fabric: Cotton denim Inner fabric: Cotton (with interlining) I enjoy making these as a hobby, finding fabrics I like. Please refrain from purchasing if you are concerned about imperfections such as warping, or if you are seeking perfection. #goat