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) 16x31 Frame. BulletPoint3 : This mat will fit a 12x27 Photo. Actual opening size will be 11.75x26.75. BulletPoint4 : 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. Color : Tangerine ItemDisplayDimensions_Height : 16 inches ItemDisplayDimensions_Length : 31 inches ItemDisplayDimensions_Width : 31 inches ItemDisplayWeight : 1 pounds ItemName : 16x31 Tangerine / Octoberfest Custom Mat for Picture Frame with 12x27 opening size (Mat Only, Frame NOT Included) ItemPackageDimensions_Height : 16 inches ItemPackageDimensions_Length : 31 inches ItemPackageDimensions_Width : 31 inches ItemPackageQuantity : 1 ItemShape : Rectangular ItemTypeKeyword : photo-mat-boards Manufacturer : ArtToFrames Material : Paper ModelNumber : MAT-120-16x31-Octoberfest NumberOfItems : 1 OccasionType1 : Mother's Day OccasionType2 : Grandparents Day PartNumber : MAT-120-16x31-Octoberfest Size : 16x31 StreetDate : 2017-03-28T00:00:01Z Style : Customized TargetAudience : Unisex Adult UnitCount : 1 UnspscCode : 60121400