How to Choose the Right Mat for an 8×10 Frame? | Sizing Guide

For an 8×10 print, a mat opening of 7.5 x 9.5 inches typically works, letting the mat edge overlap the artwork to hold it securely.

The first step to choosing the right mat for an 8×10 frame is to measure your artwork, then work out from there. The mat’s opening, or window, must be slightly smaller than the image so the mat overlaps the edges. This keeps the print from peeking through or falling out. The mat’s outer dimensions, meanwhile, must match the frame and glazing size exactly. Once you lock in the opening, you add equal borders on all sides to arrive at the final outer size.

What Size Should the Mat Opening Be?

Framing sources give a few standard opening sizes for an 8×10 image, and the difference comes down to how much of the artwork you want hidden. A common ready-made 8×10 photo mat uses a 7.5 x 9.5 inch opening, which provides a 1/4 inch overlap on each side. Custom framers often use a 7.75 x 9.75 inch opening for a slightly smaller 1/8 inch overlap per side, hiding less of the image.

If you want the full image visible with no overlap at all, a float-mount style works instead. This calls for an opening larger than the artwork, often about 9 x 11 inches for an 8×10 print. The artwork sits behind the opening, and the mat covers none of it.

Here is a quick reference for the two most common overlap styles:

Whichever overlap you choose, subtract double the overlap from both dimensions. A 1/4 inch overlap per side removes 1/2 inch from the width and height, giving you the 7.5 x 9.5 opening. For a landscape image, subtract from the width first; for portrait, subtract from the height first.

Choosing the Right Frame Size for an 8×10 Mat

Once the opening is set, the mat’s outer size must equal the frame’s inside dimensions. Ready-made mats sized for 8×10 prints pair most often with 10×12, 10×14, or 11×14 frames, depending on how wide you want the border to be. A 10×12 frame gives a 1.25 inch border around a 7.5 x 9.5 opening; an 11×14 frame gives a much wider 2.25 inch border, which suits larger wall spaces.

One trap to avoid: the frame’s labeled size is not its true inside measurement. That extra 1/8 inch gives the contents room to sit comfortably. Measure the actual frame opening before cutting or buying a mat, because cheaper frames sometimes allow less tolerance and need a slightly smaller mat to fit.

Matting Without a Frame Mat

An 8×10 frame also works without any mat at all. In that case, the artwork goes directly into the frame, and no opening calculation is needed. This approach shows the full image edge-to-edge, though it offers no border, and the print must fit the rabbet exactly.

Matting an 8×10 print does more than add a border. It keeps the artwork from touching the glass, which prevents sticking and condensation damage over time. For photos or art you want to preserve, choose acid-free or archival matboard, and leave a small allowance in the fit so the mat and backing board can expand and contract with humidity and heat. For a frame that comes pre-matted, matching the opening to a standard 7.5 x 9.5 size saves the trouble of cutting one yourself, and you can find quality options in our roundup of the best 8×10 matted frames.

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