Specification Brand : ArtToFrames BulletPoint1 : Mat is standard 4 ply material used in Custom Frame shops. BulletPoint2 : Made of lignin-free and pH-neutral materials. Fits into a(n) 11x17 Frame. BulletPoint3 : This mat will fit a 7x13 Photo. Actual opening size will be 6.75x12.75. BulletPoint4 : NOTE FOR ORDERS SOLD BY ArtToFrames ONLY: OPENING SIZE(s) MAY BE CHANGED BY CUSTOMER. Please reach out to us with your desired opening size. 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. Color : Fountain Blue - 10 Pack ItemDisplayDimensions_Height : 0.5 inches ItemDisplayDimensions_Length : 17 inches ItemDisplayDimensions_Width : 11 inches ItemDisplayWeight : 0.17 pounds ItemName : 11x17 Fountain Blue/Baby Blue Custom Mat for Picture Frame with 7x13 Opening Size (Mat Only, Frame NOT Included) - 10 Pack ItemPackageDimensions_Height : 5 inches ItemPackageDimensions_Length : 23 inches ItemPackageDimensions_Width : 20 inches ItemShape : Rectangular ItemTypeKeyword : photo-mat-boards Manufacturer : ArtToFrames Material : 4-Ply Acid Free Cardboard NumberOfItems : 10 PartNumber : Pack_10_MAT-176-11x17 ProductDescription : Fits a 11x17 Frame, and a Photo 7x13. For custom cuts and designs please reference !~Product SKU # - - Pack_10_MAT-176-11x17~\ ProductSiteLaunchDate : 2024-03-14T02:56:32.149Z Size : 11x17