FONS & PORTER-Multi Purpose Pressing Sheets can be used to protect pressing or work surfaces or over a project to prevent any fusible from getting to the iron. Non-stick heat resistant sheets should be used with a dry iron. Set heat according to fusible product instructions. Heat will penetrate pressing sheet. Use only on an ironing board or protected work surface. Do not use on a cutting mat or any other heat sensitive surface. Sheet measure: 11" x 17".