August 11, 2026
A-boards (also called sidewalk signs or sandwich boards) typically hold posters in the 18×24 or 24×33 inch range. Here’s exactly what to know about A-board sizes before you print or buy.
A-boards are those freestanding sidewalk signs you see outside restaurants, bars, coffee shops, and retail stores. They open like a ladder or an “A” shape, hence the name. The poster or graphic panel slides into a frame at the top of each side.
We work with A-boards in street-level campaigns regularly. They’re a practical, portable format for point-of-sale messaging, directional signage, and local event promotion. Knowing the right A-board poster size before you print is critical. If you print the wrong size, the panel won’t fit, and you’ve wasted the print run.
Here’s everything you need to know about A-board poster sizes.
An A-board is a freestanding, double-sided outdoor sign structure. Two panels are connected at the top with a hinge or chain. The whole thing looks like an inverted “A” or a folding ladder when set up. The poster or graphic panel sits in a frame on each face of the A-board.
A-boards are a staple of sidewalk advertising across every US city. You see them on the sidewalk outside a restaurant on Greenwich Avenue in the West Village. Outside a coffee shop on Devon Avenue in Chicago. Outside a boutique on Melrose Place in LA. Outside a bar on Magazine Street in New Orleans. They’re everywhere.
The key characteristic of an A-board is that it’s freestanding, portable, and double-sided. Each side displays the same or a different poster. This gives you two exposures in one placement: one side facing pedestrian traffic from one direction, the other facing traffic from the opposite direction.
A-board poster sizes vary by manufacturer and product line. The most common standard sizes for A-board poster inserts in the US are:
| A-Board Type | Poster Insert Size | Overall Sign Height | Common Use |
|---|---|---|---|
| Small A-Board | 11 x 17 in insert | Approx. 36 in tall | Table service, close-range menus |
| Standard A-Board | 18 x 24 in insert | Approx. 48 in tall | Sidewalk retail, restaurant specials |
| Large A-Board (US) | 24 x 33 in insert | Approx. 56 in tall | High-traffic sidewalk locations |
| Euro A-Board | A1 insert (23.4 x 33.1 in) | Approx. 55 in tall | Standard in European markets |
| Heavy-Duty Sidewalk Sign | 24 x 36 in insert | Approx. 60 in tall | Outdoor campaigns, high wind areas |
The 18×24 insert size is the most common for standard US A-boards. Most A-board products sold in US restaurant and retail supply catalogs are designed around the 18×24 insert. This is the size you should design to if you don’t know the specific A-board model you’re using.
If you’re using a specific A-board model, measure the opening before you print. A-board frame dimensions vary enough between manufacturers that printing to a generic size can result in the insert being too large or too small for the frame. A quarter-inch difference can mean the poster won’t slide in or will have too much play.
Critical step: Before printing A-board posters, measure the frame opening on the actual A-board you’re using. The frame opening is slightly smaller than the panel insert size. Design to the panel size but confirm fit before committing to a full print run.
The 18×24 is the standard poster insert size for most US A-boards. The reason is that 18×24 is already the standard indoor and window poster size across US advertising. A-board manufacturers built their products around this existing standard because it made their A-boards compatible with the most widely available poster size in the market.
At 18×24, the A-board poster is visible from about 15 to 20 feet in good light. The headline text should be at least 2 inches tall for this viewing distance. The design should prioritize a single clear message: a daily special, a sale announcement, a directional arrow, or a brand statement.
The 18×24 A-board sits in a frame on the face of the sign. The frame typically has channels or clips that hold the poster flat against the face. Some A-boards have a lens or cover over the insert to protect it from weather. Others are open frames. In high-humidity or outdoor environments, lamination of the insert is recommended to prevent damage.
In Europe, A-boards typically use A1 size inserts (594 x 841 mm, approximately 23.4 x 33.1 inches). The European A1 format is the closest equivalent to the US 24×33 or 18×24 A-board sizes, though it’s not an exact match for either.
If you’re using A-boards in European markets, confirm the insert size with the supplier. European A-board manufacturers build their products around ISO A1, not US standard sizes. A US 18×24 print will be slightly too small for a European A1 frame, and a US 24×36 will be too large.
For campaigns that span US and European markets, you’ll need separate poster prints sized for each market’s A-board standard. This is a specific example of the broader rule: US and European sizes don’t align, so multi-market campaigns require separate print files.
A-board design has specific constraints that differ from standard wall or window poster design. Here’s what to account for:
The A-board frame overlaps the edges of the insert. The visible area of the poster is smaller than the total insert size. Most frames cover 0.25 to 0.5 inches of each edge. Keep all important text and design elements at least 0.75 inches from any edge to ensure they’re visible in the frame.
Pedestrians walking toward an A-board see it at an angle, then directly as they approach. The design should work from both the angled and direct view. High-contrast, simple layouts with large text read well in both conditions. Detailed designs with small text are lost at an angle.
A-boards have two sides. You can run the same design on both sides, or use different designs to communicate different messages to traffic coming from different directions. If you use different designs, make sure both inserts are labeled so the installation crew puts the right panel on the right side.
A-boards go outdoors. The poster insert will be exposed to humidity, rain, and direct sunlight. Laminated inserts last significantly longer than unlaminated paper. For extended outdoor display, use a waterproof substrate or UV-resistant lamination. An unlaminated paper insert in an outdoor A-board might last 2 to 3 days in wet weather before it starts to deteriorate.
Material tip: For A-board inserts used in outdoor locations, always laminate. Matte lamination is professional-looking and protects against moisture. Gloss lamination is more durable but can create glare in direct sunlight. Either is significantly better than unprotected paper for outdoor use.
A-boards are a common street-level advertising tool in urban environments. Restaurants use them to announce daily specials on the sidewalk. Retailers use them to promote sales visible from the street. Coffee shops use them to draw in foot traffic that might otherwise walk past.
In a dense pedestrian environment like the 14th Street corridor in Manhattan, the High Street in Notting Hill in London, or the 3rd Street Promenade in Santa Monica, A-boards are ubiquitous. Every other business has one. In these environments, design quality matters a lot. A cluttered, text-heavy, or low-contrast A-board insert gets ignored in a environment full of competing A-boards.
The A-board works best as a single-message format. One big statement. One clear offer. One call to action. The viewer has two to three seconds to absorb the message as they pass. Everything on the insert needs to be legible in that window.
For street-level poster campaigns that go beyond a single storefront, see our poster advertising services. We handle placements in all formats across all major US cities.
How does the A-board compare to other outdoor poster formats in terms of size and impact?
| Format | Poster Size | Viewing Distance | Mobility | Cost (hardware) |
|---|---|---|---|---|
| A-Board (standard) | 18 x 24 in | 5 to 20 ft | High (portable) | $50 – $200 |
| Window Poster | 18 x 24 in | 10 to 25 ft | None (fixed) | Frame only: $20 – $80 |
| Building Surface Poster | 24 x 36 in | 15 to 40 ft | None (pasted) | Low (paste/tape) |
| Snap Frame (floor stand) | 18 x 24 or 24 x 36 in | 5 to 30 ft | High (on wheels) | $100 – $400 |
| Bus Shelter Panel | 40 x 60 in | 20 to 50 ft | None (fixed) | High (paid placement) |
The A-board occupies a specific niche: it’s portable, freestanding, double-sided, and close-range. It’s the right tool for point-of-sale messaging at a specific business location. For neighborhood-wide or city-wide campaigns, you need different formats in addition to or instead of A-boards.
Choosing the right A-board poster size has a direct impact on your printing costs. Here’s a realistic breakdown of what different sizes cost to print in commercial quantities.
The 11×17 format is the least expensive to print. Standard digital presses handle this size efficiently. In quantities of 50 to 500, 11×17 color prints on 80-pound matte stock run $0.50 to $2.00 per sheet. For a restaurant changing weekly specials, this is the most budget-friendly option. The drawback is that 11×17 inserts are small and have limited visibility from more than 10 feet away.
The 18×24 is the sweet spot for most applications. Wide-format digital printing brings the cost to $2.00 to $5.00 per sheet in quantities of 25 to 100. For quantities over 100, costs drop to $1.50 to $3.50 per sheet. Laminated 18×24 inserts run $3.00 to $8.00 per piece depending on laminate type. This is the format we recommend for most sidewalk A-board campaigns.
Larger format inserts cost more to produce. Wide-format prints at 24×36 run $4.00 to $10.00 per piece in typical campaign quantities. The larger format is worth the cost when visibility from greater distances matters, for example in a high-traffic intersection where pedestrians approach from 30 or 40 feet away before they stop.
A-boards placed on public sidewalks are regulated in most US cities. The rules vary by city and in some cases by neighborhood. Here is what to know before you set one out.
In New York City, A-boards on city sidewalks are regulated by the NYC Department of Transportation and community boards. Placement is generally allowed in front of the business’s own premises, but A-boards cannot block the required pedestrian clear path (minimum 8 feet in most areas). On busy corridors like Broadway in SoHo or Fifth Avenue in Midtown, placement restrictions can be stricter. Check the specific block’s regulations before setting out an A-board in Manhattan.
Chicago allows A-boards in front of business premises under a series of city ordinances. The sign cannot extend more than 2 feet from the building facade and must leave a clear pedestrian path. On the Magnificent Mile on Michigan Avenue, the business improvement district has specific sign placement guidelines that supplement city local rule.
Los Angeles has more flexible sidewalk sign regulations than New York but placement still requires maintaining a clear pedestrian path. On commercial corridors like Abbot Kinney Boulevard in Venice or Vermont Avenue in Los Feliz, business improvement districts sometimes have additional guidelines for sidewalk sign placement and aesthetics.
Different business types get the most value from different A-board configurations. Here’s how industry affects the optimal size choice.
Restaurants and bars are the most common A-board users in the US. The standard 18×24 works well for most restaurant applications. Daily specials boards with large, readable text in chalk or printed inserts. Happy hour announcements. Event listings. The insert changes frequently (daily or weekly), so a durable A-board frame with easy-change insert mechanism is worth the investment. Laminated inserts resist the kitchen and bar environment better than unprotected paper.
Retail stores use A-boards for sale announcements, new arrival notices, and directional signage for interior departments or fitting rooms. A larger 24×33 format works well for retail because the messages tend to have more visual hierarchy (images, prices, product names) that benefit from the additional space. High-quality printed graphics on a larger format look more professional than handwritten or simple text-only inserts on a smaller board.
Beauty businesses use A-boards for seasonal service promotions and appointment availability announcements. The 18×24 is standard for these applications. Design quality matters in this category because the A-board is often the first visual signal a potential new client gets about the salon’s aesthetic standard. A well-designed, professionally printed insert signals quality. A handwritten or low-quality insert signals the opposite.
Coffee shops are heavy A-board users. Multiple A-boards often appear: one at the entrance announcing specials, one at the counter announcing loyalty programs or new items. Smaller 11×17 A-boards work well for counter use. Sidewalk-facing A-boards benefit from the 18×24 format for visibility from the sidewalk approaching the door. Many coffee shops rotate inserts weekly to keep the messaging fresh for regular customers who pass by daily.
The most common A-board poster size in the US is 18×24 inches. Some A-boards use 24×33 or 24×36. The best approach is to measure the frame opening on your specific A-board before printing, because dimensions vary by manufacturer.
The standard US A-board poster insert size is 18×24 inches. Most US restaurant and retail A-boards sold through supply companies are designed for this insert size. Always confirm with the specific product specs before ordering prints.
European A-boards typically use A1 size inserts (594 x 841 mm, approximately 23.4 x 33.1 inches). This is the ISO standard size for European A-boards. It’s close to but not exactly the same as the US 18×24 or 24×33 standard.
Some A-boards are designed for 24×36 inserts, but most standard A-boards use smaller sizes. A 24×36 insert will typically be too large for a standard 18×24 A-board frame. Check your specific A-board’s insert dimensions before ordering 24×36 prints for A-board use.
For outdoor A-board inserts, use laminated paper or a weatherproof substrate. Standard paper inserts will deteriorate quickly in humid or wet conditions. Matte laminate provides good durability and professional appearance. Some vendors offer direct-print on PVC or polypropylene substrates, which are inherently waterproof.
Design your A-board poster at the exact insert dimensions (e.g., 18×24 inches). Keep all critical content at least 0.75 inches from each edge to account for frame overlap. Use a single dominant message with very large text (minimum 2 inches tall for the headline). High contrast colors (dark on light or light on dark) read best at typical A-board viewing distances.
A standard A-board with an 18×24 insert is typically 45 to 50 inches tall overall. This puts the top of the sign at roughly chest height for most adults, and the center of the poster at about waist to eye level. Larger A-boards with bigger inserts may be 55 to 65 inches tall.
Ready to Run Your Campaign?
Call us or email us. We’ll tell you exactly what we can do in your market and what it costs.
American Guerrilla Marketing — Los Angeles
Street-level campaigns in Los Angeles and nationwide. Wheatpasting, LED trucks, street teams, and more.
(646) 776-2770
Related Services
Explore similar advertising solutions offered by American Guerrilla Marketing.
August 11, 2026
August 11, 2026
August 11, 2026
August 11, 2026
August 11, 2026
