{"product_id":"21x31-deep-blue-midnight-blue-custom-mat-for-picture-frame-precise","title":"21x31 Deep Blue \/ Midnight Blue Custom Mat for Picture Frame - Precise","description":"\u003cp\u003eOur review of the 21x31 Deep Blue \/ Midnight Blue Custom Mat finds it ideal for hobbyists and framers who want a dependable, classic mat without buying a complete frame. The biggest reason to buy is simple: it offers a precise, professional cut in a standard 4 ply construction that easily fits a 21x31 frame and a 17x27 photo while using \u003cstrong\u003elignin-free, pH-neutral materials\u003c\/strong\u003e to protect artwork. This mat is clearly aimed at those who want accurate measurements, color fidelity, and a neat finished presentation without paying for full framing services.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard 4 ply construction:\u003c\/strong\u003e Provides a firm, flat mat board that holds its shape and reads like a material used by custom frame shops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConservation-safe materials:\u003c\/strong\u003e Made from lignin-free and pH-neutral stock so photographs and prints are protected from acid damage over time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFit for 21x31 frames:\u003c\/strong\u003e Sized to slip into a 21x31 frame and present a centered opening for a 17x27 image.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eActual opening precision:\u003c\/strong\u003e The factory opening is cut to 16.75 x 26.75 in, offering consistent, reliable measurements for easy framing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomizable opening size:\u003c\/strong\u003e Orders sold by the brand allow you to request a different opening size by email if needed, which is useful for nonstandard images.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis mat is best for DIY framers, artists, and small galleries that already own or plan to buy a 21x31 frame and need a high-quality mat board to finish the presentation. It suits anyone who values accurate cuts, conservative color reproduction, and archival-grade materials for photographs or prints.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include buyers who want a framed product delivered ready to hang or customers who need very decorative or textured mats beyond a standard 4 ply finish. Also, if you require same-day custom cuts, note that custom opening requests should be sent within two hours of ordering.\u003c\/p\u003e\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, shop-standard 4 ply construction gives a professional look without a custom framing price.\u003c\/li\u003e\n\u003cli\u003eConservation-safe, lignin-free and pH-neutral material protects prints and photos over time.\u003c\/li\u003e\n\u003cli\u003eAccurate cut dimensions and color consistency earn praise from customers for fit and appearance.\u003c\/li\u003e\n\u003cli\u003eOption to request a custom opening size provides flexibility for nonstandard images.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDefault opening is 16.75 x 26.75 in, so buyers must request a change quickly if they need a different size.\u003c\/li\u003e\n\u003cli\u003eMat only is sold; customers looking for a complete framed piece will need to source a frame separately.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eMat only (frame not included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter size\u003c\/td\u003e\n\u003ctd\u003e21 x 31 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntended photo size\u003c\/td\u003e\n\u003ctd\u003e17 x 27 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActual opening size\u003c\/td\u003e\n\u003ctd\u003e16.75 x 26.75 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\u003eCustom options\u003c\/td\u003e\n\u003ctd\u003eOpening size may be changed on request (contact seller)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eMAT-837-21x31\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eFor anyone who frames their own work or assembles gallery-style presentations, this 21x31 Deep Blue \/ Midnight Blue mat is a practical, value-minded choice because it combines accurate cuts, archival-grade materials, and dependable color. It is good value for buyers who need a clean, professional mat board and are comfortable sourcing a matching frame separately.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan the opening size be changed?\u003c\/strong\u003e\u003cbr\u003eYes. For orders sold by the brand you can request a custom opening by email or the contact seller link; if no request is received within two hours the mat will be cut to the listed opening size.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill this mat fit my 21 x 31 frame?\u003c\/strong\u003e\u003cbr\u003eYes. The mat is sized to fit a 21 x 31 frame and is intended to display a 17 x 27 photo with the factory opening at 16.75 x 26.75 in.\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 protecting photographs and prints.\u003c\/p\u003e","brand":"ArtToFrames","offers":[{"title":"Default Title","offer_id":48246293692635,"sku":"B01B39GL0Y","price":33.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/614HJirXCXL._AC_SL1500_c369741e-fda1-404b-984b-1c966e8b7e20.jpg?v=1771072231","url":"https:\/\/gearmusthave.com\/products\/21x31-deep-blue-midnight-blue-custom-mat-for-picture-frame-precise","provider":"GearMustHave","version":"1.0","type":"link"}