I use this all of the time, but I get mine at a business that makes signs, and it costs $2 for a large sheet that I can get 4-5 purse bottoms out of. And last time I went in, she gave me a scrap piece about the same size that they had left over from a job that was perfect, and didn't charge me a cent. This stuff holds up forever! I make a sleeve for it out of my lining fabric, and just slip it off when I wash my purse.