How to Mat a Picture: Step‑by‑Step Guide for Beginners

Over the years, I’ve seen how a simple mat can completely change the way a photograph is viewed. The image doesn’t change, but the presentation does. A mat creates space around the fine art photograph, helps direct attention where it belongs, and gives the finished piece a more refined appearance. Also, proper storage and handling help preserve a print for decades.

If you enjoy displaying fine art photography, learning how to mat a picture is one of the easiest ways to elevate the final result.

A close-up image shows hands carefully guiding a mat cutter along a metal ruler on a white mat board, highlighting the precision involved in mat cutting for framing artwork or family photos. The scene emphasizes the importance of using a straight edge to create perfectly centered openings for a classic look in picture frames.

Why Mat a Picture Instead of Just Framing It?

A mat is a rigid board-typically made from paper or cotton fiber-with a window cut into it. That window surrounds your picture, creating a border of white space between the image and the frame edge. Think of it as a visual cushion that gives the image breathing room and enhances its prominence.

I also have a more general article that you might be interested in: A Complete Guide to Matted Prints for Fine Art Photography

I’ve always been fascinated by how much a mat can change the presentation of a photograph without changing the photograph itself. Take a 5×7 fine art print as an example. Place it directly into a 5×7 frame, and it fills the entire viewing area. Now take that same print and mount it in an 11×14 mat before framing it. The image suddenly feels more deliberate and more substantial on the wall. The extra space around the photograph gives your eye a place to rest before moving into the image itself. It’s a technique galleries have used for decades, and when it’s done well, it can make a relatively small photograph feel far more significant than its actual size.

Beyond aesthetics, matting provides essential protection and refined visual presentation for artwork. Mats protect artwork from touching the glass, which is critical because that physical gap prevents moisture buildup and optical distortions. In humid rooms like bathrooms or kitchens, condensation between the glazing and the paper can cause sticking, mold growth, and permanent damage. Mats create a physical barrier that prevents condensation and protects artwork from humidity-related discoloration and damage. Using an acid-free mat and archival-quality backing board prevents yellowing and "mat burn" over decades-important for wedding photographs, original drawings, and limited-edition prints.

Before I get into the process, it’s worth mentioning that most people don’t need to cut their own mats. Standard pre-cut mats are widely available in common sizes such as 8×10, 11×14, 16×20, and 20×24, making it easy to create a professional presentation without any specialized tools. This is one of the reasons I offer my photographs in standard print sizes. Whether you’re purchasing a mat online or visiting a local framing shop, finding a mat and frame to fit the print is usually straightforward. For many collectors, buying a ready-made mat is the simplest and most affordable solution.

For those who want complete control over the presentation, however, learning how to cut and assemble your own mat can be a rewarding skill. This post will walk you through exactly how to measure, cut, and assemble a mat at home, even if it’s your first time picking up a mat cutter.

Related Reading: If you’re planning to frame your finished piece, read my guide on framing black and white photographs.

Tools and Materials You Need to Mat a Picture

Before you start mat cutting, gather everything in one clean workspace. Here's what you need:

• Acid-free mat board (standard mat board sheets measure 32×40 inches; you'll trim to size)
• Backing board- acid-free foam core or 4-ply board
• A picture frame with glass or acrylic glazing
• Your artwork, photo, or print

For cutting tools:

• A rail-guided mat cutter or handheld bevel mat cutter
• Self-healing cutting mat to protect your surface
• Metal ruler with cork backing (prevents slipping)
• Sharp utility knife or X-Acto blade
• Pencil for marking

For mounting:

• Acid-free hinging tape or linen tape
• Archival photo corners
• Low-tack painter's tape for temporary positioning

For cleaning and assembly:

• Microfiber cloth
• Glass cleaner (ammonia-free if using acrylic)
• Soft brush or blower for dust removal

If you're not ready to invest in a mat cutter immediately, beginners can start with pre-cut custom mats in standard photo sizes-like an 8"×10" opening for an 11"×14" frame-and focus on learning the mounting and assembly steps first.

A clean work table displays various mat-cutting tools, including a ruler, a mat cutter, a pencil, and a cream-colored mat board, ready to create perfectly centered openings for family photos or artwork. The setup highlights the importance of precision in mat cutting, ensuring an archival quality finish for framed pieces.

Choosing the Right Mat Board and Backing Board

Not all board is created equal. The material you choose directly affects how long your framed piece will last.

Mat board is a stiff board surrounding the image. Budget options use wood pulp, which contains lignin-a natural compound that breaks down over time, causing acid migration and brown staining on your art. Lignin-free mats avoid discoloration from light exposure. Conservation boards are purified wood pulp with the acid removed, while cotton museum board is 100% acid-free and pH-balanced, naturally stable for a century or more. Acid-free mats prevent discoloration and deterioration of artwork, and acidic mats can damage artwork over time, especially prints.

Mat boards come in thicknesses ranging from 2-ply to 8-ply:

• 2-ply: thin, subtle bevel, best for decorative layers
• 4-ply: the standard thickness for mats-use a 4-ply board for adequate mat depth on most home projects
• 8-ply: extra deep, dramatic bevel, heavier, requires a deeper frame

Four-ply board is the standard thickness for mats and works for the vast majority of photographs and prints.

For backing, acid-free foam core is lightweight and rigid. For archival projects-original watercolors, signed prints-use conservation-grade backing board. Standard foam core works for casual projects, but it can off-gas over time.

A practical recommendation: for a child's 2022 school photo you plan to display long-term, a buffered acid-free white mat and acid-free foam core backing is a solid, affordable choice.

Planning Your Mat Size and Layout

This step is where matting a picture either comes together or falls apart. Take your time here.

Two key dimensions to understand:

• Mat size (outer dimensions): matches the inside of your picture frame. For an 11"×14" frame, your mat board's outer edge is 11"×14".
• Window size (the opening): the rectangle you cut to reveal the image. This should be slightly smaller than the artwork so the mat overlaps the edges.

Mats can range from very narrow to several inches wide. Neutral colors like white or cream colored tones are preferred for mats because they complement most art without competing for attention-a classic look that works on any gallery wall.

Here's a concrete example. You have an 8"×10" photo and a 16"×20" frame:

• Side borders: (16" − window width) ÷ 2. Choose 2.75" side borders, giving a window width of 10.5".
• Top border: 2.5"
• Bottom border: 3.0" (bottom-weighted)
• Window height: 20" − (2.5" + 3.0") = 14.5"
• Final window: 10.5" × 14.5"

The mat opening should overlap the artwork edges by about 1/8 to 1/4 inch on each side, preventing gaps and hiding where paper meets board.

Bottom-weighted mats use a slightly larger bottom margin-about 1/4" to 1/2" more than the top. This compensates for an optical illusion that makes evenly spaced borders look top-heavy when a piece is hung at eye level. The result appears perfectly centered on the wall.

Using multiple mats can add depth to the presentation-a thin accent mat peeking out beneath the main mat creates extra space and visual layering. Matting creates visual depth by adding space and dimension to the artwork.

Sketch your layout on scrap paper first. A five-minute drawing with a ruler saves wasted mat board.

How to Measure and Mark Your Mat Board

With your plan on paper, move to the actual board.

• Cut the mat board to the outer size of your frame first. For an 11"×14" picture frame, trim to exactly 11"×14" using a straightedge and a sharp blade. Confirm corners are square.
• Flip the board face-down. All window measurements go on the back so pencil marks stay hidden on the finished mat.
• Measure in from each edge by your planned border width. For example: 2.5" from the top, 2.75" from each side, 3.0" from the bottom. Draw light pencil lines to form a centered rectangle.
• Double-check at each corner. Measure the top border at both the left and right edges-they should match. Do the same for the sides. If opposite sides don't match, the window will be crooked.
• Mark "TOP" on the back with pencil. This keeps the orientation consistent through every remaining step, especially important when using a textured or cream-colored mat where the front and back look similar.

Using a Mat Cutter: Clean, Beveled Openings

Mat cutting is the step most beginners worry about, but with a sharp blade and steady hand, you'll get clean results.

Set up your rail-guided mat cutter or position a handheld bevel cutter against a metal ruler on a cutting mat. Cutting heads on mat cutters should ride on a rail for consistent pressure and angle. If you're using a handheld cutter, clamp your ruler firmly.

Blade preparation matters more than technique. Always use a new, sharp blade-dull blades tear the mat surface and leave fuzzy, unprofessional bevels. Replace blades frequently.

The cutting sequence:

• Position the blade at one corner of your pencil line, starting slightly before the intersection so the cut enters cleanly
• Press the blade down and pull or push steadily along the line
• Stop slightly past the opposite corner's pencil line to release the cut fully
• Repeat for all four sides

The blade is angled at 45°, so the core of the mat board-white, black, or colored-shows as a beveled edge around the opening. The beveled edge of a mat adds depth and a professional appearance. It's a detail that separates a flat piece of cardboard from a polished mat.

After all four cuts, gently push the inner window out from the back. If it snags at a corner, carefully recut just that section rather than forcing it and tearing fibers.

Hand-cut mats may introduce human error, so practice on scrap board first. For complex shapes-ovals, multi-window layouts-mats can be cut using computerized mat cutters that professionals use for custom framing projects.

Mounting Your Picture to the Backing Board

Now that your window mat is cut, it's time to attach your artwork to the backing board-not to the mat itself.

• Use acid-free hinging tape or linen tape to create a T-hinge at the top edge of the artwork. Acid-free mats prevent mat burn on artwork, and archival mats protect artwork from acids and contaminants in framing materials.
• The T-hinge technique: attach a short strip of tape to the back of the artwork near the top edge, letting half the strip extend above the paper. Then lay a second strip across it horizontally on the backing board, forming a "T." The picture can hang freely from the top.
• For irreplaceable prints-signed art, original photographs-use archival photo corners instead. Corners hold the print in place without any adhesive touching the paper itself. The artwork can be removed later without damage.
• Mount to the backing board, not the mat board. This allows the mat to be removed in the future without damaging the art. It also allows the paper to expand and contract slightly with humidity between seasons. Using archival hinges allows the artwork to expand and contract naturally.
• Archival-quality mats provide safe mounting and help hide hinging materials beneath the window border.

Simple example: a 2020 graduation photo sized 8"×10", mounted on an 11"×14" backing board with two T-hinges along the top edge only. The photo hangs flat, the edges stay free, and removal is easy if you ever want to remat.

Hinging the Window Mat to the Backing Board

The window mat and backing board need to work together as a single unit-connected along one edge like a book cover.

• Place the artwork-mounted backing board faces up on a clean surface.
• Lay the window mat on top, adjusting until the image is perfectly centered in the opening. Check all four borders.
• Hold or clamp the top edge in place so nothing shifts.
• Run a strip of acid-free tape along the back of the top edge, bridging the mat and backing board to create a hinge.
• This hinged mat pack can be lifted like a cover to access the artwork later without peeling off tape or recutting anything.

Galleries and photo contests in the 2020s often expect this hinged, archival matting method when work is delivered unframed. It's a standard technique worth learning even if you plan to frame every piece.

Cleaning the Glass and Assembling the Picture Frame

You're almost done. A few specks of dust trapped inside the frame will haunt you every time you walk past the wall, so take this step seriously.

• Remove the frame's existing backing board, paper backing, and any stock inserts.
• Clean both sides of the glass or acrylic with a lint-free microfiber cloth and cleaner. If your frame uses acrylic, use only ammonia-free cleaner to avoid hazing.
• Hold the glass under strong light and look for streaks, fingerprints, or dust. Don't rush this-lay the glass flat and inspect at an angle.
• Place your mat/backing sandwich into the frame with the artwork facing the glass and the backing board behind. Make sure the mat sits squarely in the rabbet (the interior lip of the frame).
• Insert or bend down the frame's metal tabs, flexible points, or brads evenly around all four sides. These should hold the backing board snugly but not so tight that the glass warps.
• Final inspection: turn the frame over, tap gently, and listen for rattling. If anything shifts, or you spot loose fibers or dust inside, reopen and clean before sealing.

You now have a finished, mounted, and assembled framed piece ready to hang.

Examples of Matting Different Types of Artwork

Matting enhances aesthetics by adding a polished border that directs viewer attention. Mats enhance the aesthetic appeal of framed pieces across virtually every type of art. Here are specific scenarios:

• 4"×6" 2015 travel photo: Mat in an 8"×10" frame with a neutral white, 4-ply acid-free mat board. Use 1.75" borders on three sides and a slightly larger 2.25" bottom border. A slim black frame provides contrast.
• 9"×12" watercolor painting on cotton paper: Mat in a 16"×20" picture frame with a soft off-white mat. Use wider 3"–3.5" borders and a conservation backing board to complement the art and protect the paper's delicate fabric.
• 12"×18" concert poster from 2009: Choose a bold charcoal gray mat in a 20"×26" frame. Wide borders add drama and prevent curling edges from pressing against the glass. This is a large piece that benefits from extra space around the image.
• Child's drawing from 2023: Use a double mat-a thin colored accent mat with a 1/4" border peeking between the art and an outer white mat. Using multiple mats can create a sophisticated presentation even with casual artwork. This is a great technique for a sewn canvas or drawing on textured paper.

When might you skip a mat? Full-bleed prints where the image runs to every edge-like a large 24"×36" photo print-are sometimes mounted directly in a frame. But without a mat, you lose the air gap, depth, and protection the mat provides. In most cases, matting a picture is worth the effort.

Common Matting Mistakes and How to Avoid Them

Even experienced framers make errors. Here are the most common pitfalls and how to fix them:

• Cutting the window the same size as the picture. This leaves no overlap, so edges show gaps or the image slips. Fix: plan a 1/8"–1/4" overlap on all sides using a ruler and mark carefully.
• Using non-acid-free cardboard as backing for important 1990s or early-2000s photos. Over time, acid from wood pulp boards causes yellowing and mat burn. Fix: upgrade to acid-free backing and rematting.
• Taping all four edges of the artwork flat. This prevents natural expansion, causing the paper to buckle when humidity changes. Fix: use T-hinges or photo corners so the print can move slightly. Attach at the top edge only.
• Uneven borders from rushed measuring. One corner ends up visibly wider than the opposite side. Fix: measure twice from each edge, use a sharp pencil, and verify with a reliable metal ruler. Never eyeball it.
• Handling board and prints with dirty or oily hands. Oils cause smudges on the mat surface and can stick to the image. Fix: wash hands first or wear clean cotton gloves. Work on a dust-free surface, and don't use glue or adhesive unless it's archival-grade.

When to DIY and When to Use a Professional Framer

DIY mat cutting is ideal for standard-size family photos, posters, digital prints, and kids' artwork projects where you can practice, learn, and build skills without high stakes. Mats add depth and dimension to framed artwork, and the process is straightforward once you've done it a few times.

Professional custom framing makes more sense for irreplaceable items: original 1970s film photographs, antique documents, signed limited-edition prints, and valuable watercolors on delicate paper. Professionals use computerized mat cutters capable of producing complex multi-window mats, ovals, V-grooves, and very large formats that go beyond what typical home tools can do. They also have access to museum board and conservation-grade materials that guarantee preservation for a century.

Start by matting one inexpensive print from around 2021–2024 to build confidence before tackling heirloom pieces.

The core process is simple to wrap your head around: choose an acid-free mat board, plan your mat size, cut a clean beveled window, mount the artwork to the backing, hinge everything together, and assemble the frame.