{"product_id":"21x31-midnight-blue-custom-mat-for-17x27-photo-precise-4-ply-cut","title":"21x31 Midnight Blue Custom Mat for 17x27 Photo - Precise 4-ply Cut","description":"\u003cp\u003eOur review of the 21x31 Midnight Blue custom mat finds it best suited to photographers, framer hobbyists and anyone who needs a precise, archival-quality mat that fits into a 21x31 frame and frames a 17x27 photo. The single biggest reason to buy is its reliable construction: the mat is standard 4 ply material used in custom frame shops, made from lignin-free and pH-neutral materials, so it both looks professional and preserves artwork or photographs over time.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4 ply construction:\u003c\/strong\u003e The mat uses the same standard 4 ply material found in custom frame shops, giving a professional depth and rigidity that improves presentation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eArchival materials:\u003c\/strong\u003e Made from lignin-free and pH-neutral materials, the mat helps protect photos and prints from acid damage and long-term discoloration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame fit:\u003c\/strong\u003e Sized to fit inside a 21x31 frame, it provides a predictable border that aligns with common framing standards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhoto opening:\u003c\/strong\u003e Designed to hold a 17x27 photo with an actual opening of 16.75x26.75, the mat provides a snug, accurate reveal that matches customer expectations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomizable opening:\u003c\/strong\u003e Orders sold by the brand allow customers to request a different opening size within two hours of purchase, which is useful for nonstandard prints.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis mat is for people who already own a 21x31 frame and want a clean, archival-quality presentation for a 17x27 photo or print. It suits craft and framing enthusiasts, photographers preparing prints for display, and anyone seeking consistent measurement accuracy in a mat.\u003c\/p\u003e\n\u003cp\u003eIt is less suitable for buyers who need frames included or who expect immediate custom cutting without contacting the seller; customers must request changes to the opening size by email or the contact link within two hours of ordering if they want a different reveal.\u003c\/p\u003e\n\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHigh quality 4 ply mat material provides professional depth and durability.\u003c\/li\u003e\n\u003cli\u003eArchival, lignin-free and pH-neutral construction helps protect artwork long term.\u003c\/li\u003e\n\u003cli\u003eAccurate measurements and cut quality result in a snug fit for a 17x27 photo.\u003c\/li\u003e\n\u003cli\u003eOption to request a custom opening size adds useful flexibility for nonstandard prints.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFrame is not included, so buyers must already own a 21x31 frame or purchase one separately.\u003c\/li\u003e\n\u003cli\u003eCustom opening changes require contacting the seller within a two hour window after ordering, which can be inconvenient for some buyers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eArtToFrames\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMat outer size\u003c\/td\u003e\n\u003ctd\u003e21x31 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntended photo size\u003c\/td\u003e\n\u003ctd\u003e17x27 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActual opening size\u003c\/td\u003e\n\u003ctd\u003e16.75x26.75 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eStandard 4 ply, lignin-free, pH-neutral\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrame included\u003c\/td\u003e\n\u003ctd\u003eNo, mat only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe 21x31 Midnight Blue custom mat is a solid choice for anyone who wants a professionally finished, archival mat for a 17x27 photo. Its accurate cut, sturdy 4 ply construction and acid-free materials deliver good value for framing projects, though buyers should remember the frame is not included and must request any opening changes quickly after ordering.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan the opening size be changed?\u003c\/strong\u003e\u003cbr\u003eYes, customers sold by ArtToFrames may request a custom opening size by email or the contact seller link; request must arrive within two hours of the order.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill this mat fit my 21x31 frame?\u003c\/strong\u003e\u003cbr\u003eYes, the mat is sized to fit into a 21x31 frame and is intended to reveal a 17x27 photo.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the mat archival?\u003c\/strong\u003e\u003cbr\u003eYes, it is made from lignin-free and pH-neutral materials suitable for preserving photos and prints.\u003c\/p\u003e","brand":"ArtToFrames","offers":[{"title":"Default Title","offer_id":48261966430427,"sku":"B01B3G4QOA","price":33.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61emYIzpOFL._AC_SL1500_52c909db-99f3-4595-9e5b-2893b6711965.jpg?v=1778335409","url":"https:\/\/gearmusthave.com\/products\/21x31-midnight-blue-custom-mat-for-17x27-photo-precise-4-ply-cut","provider":"GearMustHave","version":"1.0","type":"link"}