These are 100% wool plaids, stripes and checks. I tear my fabric to make sure each swatch is on the straight of grain, ready for you to cut. Swatches are 3 1/2" x 13" or larger. I recommend using these with a #6 cut or above. As most of this is up-cycled material from woolen garments, once it's gone I cannot replace it. Be sure to buy enough for your needs up front!