Our bags of fine cow leather pieces include 12 to 15 pieces in a variety of the colors and sizes. The pieces range from  about 1/4 to one square foot. Although some are rectangular, the pieces are mostly irregular in shape.  In total all the pieces in the bag equal about 5 square feet or more. The thickness of the fine cow pieces is approximately 1.0 - 1.2 mm. (approx. 3/64" or .04"). These pieces are popular for a wide variety of crafts, including making small books.