The Design Pro Appliqu Mat is the ultimate tool to assist in the creating process of appliqu. Excellent size for most work areas. 11-5/8in x 16.5in. The surface has a holding type component which secures the pieces in place while you press them into the design. Our package can be used as a storage for the mat and pressing sheet when its not in use. Comes with a handy Teflon pressing sheet to protect your iron from getting any Fusible on it. This is a must have for tracing fusible fabric