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) 8x12 Frame. BulletPoint3 : This mat will fit a 4x8 Photo. Actual opening size will be 3.75x7.75. 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 : Deep Red - 3 Pack ItemDisplayDimensions_Height : 0.15 inches ItemDisplayDimensions_Length : 12 inches ItemDisplayDimensions_Width : 8 inches ItemDisplayWeight : 0.09 pounds ItemName : 8x12 Deep Red/Deep Red Custom Mat for Picture Frame with 4x8 Opening Size (Mat Only, Frame NOT Included) - 3 Pack ItemPackageDimensions_Height : 5 inches ItemPackageDimensions_Length : 18 inches ItemPackageDimensions_Width : 15 inches ItemTypeKeyword : photo-mat-boards Manufacturer : ArtToFrames Material : 4-Ply Acid Free Cardboard NumberOfItems : 3 PartNumber : Pack_3_MAT-243-8x12 ProductDescription : Fits a 8x12 Frame, and a Photo 4x8. For custom cuts and designs please reference !~Product SKU # - - Pack_3_MAT-243-8x12~\ ProductSiteLaunchDate : 2024-03-07T11:58:57.987Z Size : 8x12