A Frame Sign Dimensions | Industry Standards For Sidewalk Signs

There is no single universal standard for A-frame sign dimensions, but 24″ × 36″ is the most widely used poster-equivalent size for US sidewalk advertising, with 22″ × 28″ and 16″ × 24″ being common alternatives.

An A-frame sign that looks too small fades into the sidewalk clutter. One that’s too large can block pedestrian traffic. The right size depends on your storefront, the message, and local regulations—but the industry has settled on a handful of poster-equivalent sizes that work for most businesses.

What Are The Standard A-Frame Sign Graphic Sizes?

A-frame signs are built around three common insert (graphic) sizes, with 24″ × 36″ being the most popular. The frame itself is a fixed size; the graphic you print fills that area.

• 16″ × 24″ — A compact size for close-range messaging in tight entrances or narrow sidewalks. Works well for small cafes, real estate open houses, or boutique shops.
• 22″ × 28″ — A horizontal layout that gives more width for longer lines of text. A solid middle-ground choice for storefronts with moderate foot traffic.
• 24″ × 36″ — The most common standard across US sign shops. It delivers the best balance of visibility and pedestrian compliance, roughly matching a one-sheet movie poster.

Larger heavy-duty A-frame signs often use graphic sizes of 25″ × 45″ or 27″ × 47″ for high-traffic zones where maximum visibility matters.

How Large Is The A-Frame Sign Itself?

The frame dimensions differ from the graphic size because the frame includes the border, legs, and structural edges. The table below shows the actual overall sign size you should expect from common US manufacturers.

A key point: the 24″ × 36″ graphic size is not customizable. The frame’s graphic area is fixed at that size, and the overall sign measures approximately 25″ × 45″.

Does The Size Change With Material?

Yes. Plastic A-frame signs (like the Signicade®) support the standard 24″ × 36″ graphic. Metal A-frame signs, like those from NextdayFlyers, use a different footprint: the graphic size is 24″ × 18″, with an overall frame of about 27.75″ × 31.5″. ACM (aluminum composite) boards, common in New Zealand and Australia, use metric sizes like 600mm × 900mm (roughly 23.6″ × 35.4″).

Which Common Mistakes Hurt Your A-Frame Sign?

The biggest error is assuming one “correct” size works everywhere and for every vendor. A few more pitfalls to avoid:

• Ignoring pedestrian clearance. Many cities require a 5-foot (or 7-foot) unobstructed corridor on the sidewalk.
• Trying to customize the frame. Most vendors fix the frame at 24″ × 36″ for graphic size and 25″ × 45″ overall.
• Overcrowding the text. Raleigh, NC, for example, rules that lettering should not exceed 80% of the board area.
• Placing the sign on the wrong side. Blocking building entrances or facing the wrong direction wastes the opportunity.

If you’re ready to buy, check our tested picks for the best A-frame sign stands to match your chosen size.

What Local Permit Rules Apply?

Permit requirements vary by city. Using Raleigh, NC, as a representative example, an A-frame sign must meet these conditions:

• Max area: 6 square feet (roughly a 24″ × 36″ graphic fits this limit).
• Max height: 3 feet. Max width: 2 feet.
• Must have locking arms or stabilizing devices to resist wind gusts up to 10 mph.
• Displayed only during business hours; removed at closing and during inclement weather.
• Content is limited to business name, logo, address, menu, sale announcements, or directional/safety info.
• Proof of $1M general liability insurance with the city as additionally insured is required for the permit.

Check with your local building or permits department for your jurisdiction’s exact rules before printing—some street-width restrictions differ.

Quick Comparison of Common A-Frame Sizes

Your choice should be driven by your message, your sidewalk width, and local codes—not just what’s most common. A 24″ × 36″ graphic is the safest bet for a US storefront, but always measure your actual sidewalk and confirm your local permit rules before ordering.