20x20 Polar White / Porcelain Custom Mat for Picture Frame with 16x16 opening size<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Mat is standard 4 ply material used in Custom Frame shops.</li><li>Made of lignin-free and pH-neutral materials. Fits into a(n) 20x20 Frame.</li><li>This mat will fit a 16x16 Photo. Actual opening size will be 15.75x15.75.</li><li>NOTE FOR ORDERS SOLD BY ArtToFrames ONLY: OPENING SIZE(s) MAY BE CHANGED BY CUSTOMER. Please include your desired opening size(s) by email， or through the contact seller link. If we do not receive a request for a custom size within 2 hours of your order it will be cut with the opening size listed above. Feel free to contact us with any questions you may have.</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41Q8eo7A7NL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/416GCNXX0JL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/61aKNxbWmvL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/512u1kRhRoL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31FvJcCpyiL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/61nXFvSQL7L.jpg" noproxy>