Plaid swatches add great texture to your hooked rug. This is a wide herringbone weave. Would be good as is for a background or gray, or could be overdyed. Try a #8 or wider cut. Frays on #6.
Assume mixed fiber on all swatches. While some are definitely wool, I cannot verify exact fiber content because this material is from up-cycled material.
~ 4″ x 12″ minimum size