Selecting the Right Size Print: Simplifying Mats, Measurements, and More

The last thing you want when you get a new art print is to open your frame and realize the print won’t fit. This guide will show you what to measure, why it matters, and how to mount the print so it stays put and looks great in any room.

Let's start with the frame. Whether you already have one in hand or not, understanding the features of frames will help ensure you're buying the right size print.

Matted vs. Unmatted

There are two main types of frames: unmatted frames and matted frames.

• An unmatted frame is one where the print sits directly behind the glass and the frame’s inner lip (called a rabbet) holds it in place. There are typically only three pieces to an unmatted frame: the glass or acrylic pane, the frame, and a backing (often wood or cardboard).
• A matted frame has a 4th piece, a mat. The mat acts like a window (typically either white, black, or gray) that sits over the print and shows only part of it. The art print is mounted behind the mat, which provides a little "breathing room" between the print and the frame. In most cases, the mat is removable, should you wish to convert your matted frame to an unmated one.

The steps for measuring are slightly different depending on your setup, so read the section that matches your frame.

Unmatted frames
Most standard unmatted frames have a small recessed lip on each side, that will cover a tiny edge of the print. The print "sits" within the recessed lip.

For these frames, you'll want to measure the opening between the outermost edges of the recessed lip, both width and height. These measurements will tell you the outer dimensions of the print you will need, so that the print sits comfortably within the frame. All art prints at Rachel Richards Fine Art are listed with their outer dimension so you'll know your print will fit within your desired frame.

It's also a good idea to measure the width of the lip itself. This measurement will tell you the size needed for your art print's border. Most standard frames have a lip, or rabbet, that is 1/4" on each side. All art prints at Rachel Richards Fine Art come standard with a 1/8" white handling border, intended to fit the rabbet of most standard frames. The 1/8" handling border on the print will sit under the lip, keeping the image protected, while also providing a clean presentation.

To mount the print in an unmatted frame, use an acid-free backing board behind the print for rigidity. If needed, you can also use a bit of acid-free archival tape on the top side of the print, where it meets the frame, to keep the print from slipping.

Matted frames
Matted frames are common and give a polished look, but the mat changes what part of the image is visible. The mat is usually cut slightly smaller than its listed size so the image shows correctly. For example, an 8×10 mat might have an actual window opening of 7 7/8 × 9 7/8.

Measure the visible opening of the mat (the part you can see through the window). This will tell you the approximate outer dimension to shop for. Mats usually overlap the paper by about 1/8 inch, perfect for our standard 1/8" handling border.

To mount a print behind a mat, use acid-free archival tape at the top edge to attach the print to the backing. This keeps it secure while allowing slight movement. Avoid taping directly across the entire surface of the print. 

Quick rules of thumb
If your frame is unmatted, measure the rabbet and order the exact outer dimension to match. If your frame is matted, measure the mat opening and order a print slightly larger than the opening so the mat overlaps just a bit. Always measure the actual opening rather than relying on the labeled frame size, which can occasionally be incorrect.

Common questions
Q: My frame has rabbet width other than 1/4 inch. Will the standard handling border still work?
A: Usually, yes. So long as the white handling border is not visible, and a significant portion of the artwork isn't covered up, our standard 1/8" handling border should still work. However, you can also email me with a custom border request to better fit your particular frame.

Q: My prints will be framed by a frame shop or designer. Should I order a different size?
A: Ask the framer. The recommendations you see here are for standard, off the shelf frames. However, a framer making a custom frame may have different requirements or suggestions for a proper fit.

If you still need help with selecting the right size for your frame, I offer complimentary design consultations, and can also do custom done-for-you framing upon request. Simply reach out by email or through the contact form on our website!