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) 21x26 Frame. BulletPoint3 : This mat will fit a 17x22 Photo. Actual opening size will be 16.75x21.75. 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 : 21 inches ItemDisplayDimensions_Length : 26 inches ItemDisplayDimensions_Width : 26 inches ItemDisplayWeight : 1 pounds ItemName : 21x26 Tangerine / Octoberfest Custom Mat for Picture Frame with 17x22 opening size (Mat Only, Frame NOT Included) ItemPackageDimensions_Height : 21 inches ItemPackageDimensions_Length : 26 inches ItemPackageDimensions_Width : 26 inches ItemPackageQuantity : 1 ItemShape : Rectangular ItemTypeKeyword : photo-mat-boards Manufacturer : ArtToFrames Material : Paper ModelNumber : MAT-120-21x26-Octoberfest NumberOfItems : 1 OccasionType1 : Mother's Day OccasionType2 : Grandparents Day PartNumber : MAT-120-21x26-Octoberfest Size : 21x26 StreetDate : 2017-03-28T00:00:01Z Style : Custom TargetAudience : Unisex Adult UnitCount : 1