How to Choose the Right 24×18 Picture Frame?

Choose a frame that matches your artwork’s exact 24×18 dimensions for a no-mat display, or a larger size to accommodate matting.

Whether you can use a 24×18 picture frame without cropping your print comes down to one thing: aspect ratio. For US shoppers, this is a standard poster and large-photo format, so finding a ready-made frame isn’t hard. The real work is matching the frame to your artwork and your wall.

Match The Frame To Your Artwork Size

The simplest rule: buy a frame with an opening that equals the artwork’s exact width and height. For a true 24×18 print, that means a frame sized 24×18 with no mat. Many standard size charts list 18×24 as a common frame dimension meant for prints of that same size, displayed without matting.

Before you order anything, measure the print at its widest and tallest points. The Austin Gallery’s framing guide recommends using a rigid ruler or tape and never guessing dimensions, since even a quarter-inch difference can make a print look off-center or force you to trim it.

If you plan to add a mat, the math changes. The mat window is cut smaller than the print so the image shows fully. That means a 24×18 frame with a mat won’t work for 24×18 artwork unless the mat opening is sized for it — you’d need a larger outer frame instead.

Check The 3:4 Aspect Ratio Before You Commit

A 24×18 frame fits images in a 3:4 aspect ratio without cropping. That’s the ratio of a standard 4×6 photo, just scaled up —

If your image is wider than 3:4, like a panoramic landscape, it will either get cropped at the edges or leave gaps on the sides. If it’s taller, like a portrait shot on a phone, you’ll have empty space top and bottom. In those cases, you have two honest options:

• Trim the artwork to fit the 24×18 opening (fine for digital prints, not for originals).
• Buy a larger frame and mat the print to center it within the 3:4 window.

FrameUSA’s size guide confirms that larger frames like 24×36 are often used for smaller prints when matting is involved, giving you room to add a border without resizing the art.

Frame Depth, Glazing, And Wall Weight — What Actually Matters

Beyond the opening size, three physical specs decide whether a 24×18 frame works for your piece. First, depth: a thick canvas or mounted print needs a deeper frame so the glazing doesn’t press against the surface. Standard poster frames are shallow and often won’t hold anything thicker than paper.

Second, glazing and backing. If you use a mat, the print must fit inside the mat opening and never be larger than the visible window — otherwise it bends or buckles behind the glass. Check that the backing board is rigid enough to keep the print flat.

Third, hanging hardware. Austin Gallery’s wall-fit guidance suggests the framed piece fill about 50% to 75% of the available wall space for visual balance — but that’s a design choice, not a rule. What’s non-negotiable is that your wall anchor supports the total weight. Use two hooks for larger frames rather than a single nail, and pick hardware rated above the frame’s weight.

If you’re ready to buy and want to compare tested options that fit these specs, our roundup of the best 24×18 picture frames covers the top picks for depth, glazing quality, and hanging ease. Logan Graphic’s framing guide also offers a standard frame size reference that spells out which sizes are made for matted versus unmatted displays.

Sizing Table: 24×18 And Nearby Standards