It's a coarse cotton fabric. It might be a plain-weave canvas. Each piece was sold individually in this size. The sizes vary. I spread them out for measurement, but they are unused and new. Below are the approximate dimensions in cm, length x width: Image 2 (off-white or pale yellow): 32 x 32 Image 3 (dark navy): 32 x 42 Image 4 (pink): 33 x 34 Image 5 (magenta): 32 x 32 Image 6 (blue-green): 32 x 34 # Cotton Fabric (Solid Color) # Handmade Fabric # Remnant Set