These are randomly sized rectangular pieces of our adhesive. They are the unused sides and ends of the sheets we cut our kits from, and will give you the freedom to cut those intricate pieces you need for making impossible repairs. Because of their irregular sizes, we sell them by weight ($5/oz.), and we include a variety of wide and narrow strips in each 1 oz. (~28.3g) bag. Pieces are typically 5-8 inches (125-200 mm) long and ½-2 inches (13-50 mm) wide, as shown in the photo. Total surface area for one oz. is approximately 120 square inches (~300cm).