How to Frame an 11×17 Poster? | The Right Frame Size & Fit

Frame an 11×17 poster in an 11×17 frame for a flush fit, or step up to a larger outer frame like 15×21 if you want a mat border.

Whether you are hanging a tabloid-size print — 11×17 is the standard term in the printing world — the framing math comes down to one decision: mat or no mat. Skip the mat and the job is simple. Add one and the outer frame size changes substantially. Measure the poster flat on a clean, hard surface first so nothing shifts, then pick the route below. The best 11×17 poster frame for your setup comes down to that same choice, and the frames we tested are here.

The Simplest Route: An 11×17 Frame Without a Mat

An 11×17 print fits an 11×17 frame with zero guesswork. Frame USA lists 11×17 as a standard size and notes that its frames are measured by inside dimensions — meaning the frame opening matches the image size exactly.

This flush look works best for posters with full-bleed artwork that runs to the edges, since no border interrupts the design. One caveat: not every product labeled “11×17” has the same visible opening. Some frames use a smaller display window than their nominal size, so check the listed viewable area before buying.

Matting an 11×17 Print: What Outer Frame Size Do You Need?

When you add a mat, the frame must grow by roughly double the mat border width on each dimension. A standard mount border runs 2–3 inches, and most framing guides recommend at least 2 inches. That means an 11×17 print with a 2-inch mat border needs a 15×21 inch frame — 11 plus 4 inches on the short side, 17 plus 4 on the long side.

Some sources suggest a 14×20 frame with a mat as an alternative, though that leaves a slightly narrower border on the long dimension. The exact outer size always depends on your mat width, so decide on the border first, then calculate. A mat gives the poster breathing room and a more gallery-like presentation, but it also demands the larger outer frame — there is no way around the added inches.

If you are still deciding between a flush fit and a matted look, the table below sums up the sizing logic.

How to Hang the Framed Poster Correctly

Hanging hardware depends on weight. Sawtooth hangers work fine for lightweight frames, while heavier ones need D-rings or cleats anchored into studs. Hold the frame against the wall, use a level to check it, and mark the wall lightly before driving any hardware. Adjust the position before fully securing everything — a poster hung crooked is the one mistake that stands out immediately.

One more distinction worth keeping straight: print size, frame opening, and outer frame dimensions are three separate measurements. The print is your 11×17 sheet, the frame opening is the visible window, and the outer dimension includes the frame molding. Confusing them is the most common reason a poster arrives at the wall looking wrong.

For a tested recommendation on which frames hold up well and look good, our roundup of the best 11×17 poster frames compares the top options side by side.

Ultimately, the right frame size flows from one decision: whether you want a mat. No mat means a direct 11×17 fit. With a mat, plan on a 15×21 outer frame for a standard 2-inch border. Measure the poster flat, match the inside dimension to the print, and hang it level. Frame USA’s standard size chart confirms that 11×17 frames are measured by inside dimensions, while Adobe’s framing guidance walks through the mat and outer-frame math step by step.