Baking has never been so easy. This baking mat - made by Silpat for the Martha Stewart Collection - works wonderfully as both a baking pan liner and working surface thanks to its exclusive silicone and fiberglass nonstick construction. Limited lifetime warranty. Martha Stewart Collection 11.6" x 16.5" Silicone Baking Silpat, Created for Macy's Home - Kitchen Kitchen - Bakeware