August 24, 2026
By Livy Phillips | American Guerrilla Marketing
Poster boards are one of those materials that most people have used but few people have really thought about. You pick them up at an office supply store, a craft shop, or a big-box retailer. They come in a range of colors and thicknesses. But when someone asks “how big is a normal poster board?” the answer is more specific than you might think.
The normal or standard poster board size in the United States is 22 inches by 28 inches. That is the size you find at Staples, Target, Michael’s, and similar stores when you grab a sheet of white poster board off the shelf. It is the format used by students, small businesses, craft makers, and anyone who needs a rigid, printable surface for a display.
But poster boards come in other sizes too. And the material type matters as much as the dimensions. Foam core boards, paper-faced boards, and corrugated plastic boards all have their own standard sizes that differ from each other. We break it all down here.
When you walk into a store and ask for a poster board, you will almost always be handed something that is 22×28 inches. Here is why that size became the standard:
The 22×28 format has also become a commercial retail standard. Grocery stores, pharmacies, and convenience stores use 22×28 promotional signs in floor stands and window displays. Fixture manufacturers build sign holders around this size precisely because the boards are so widely available and affordable.
The 22×28 is the most common, but it is not the only option. Here is a full table of poster board sizes you are likely to encounter:
| Size | Dimensions | Typical Use |
|---|---|---|
| Half Sheet | 14 x 22 in | Small displays, point-of-sale, countertops |
| Standard / Normal | 22 x 28 in | School projects, retail signage, events |
| Large | 24 x 36 in | Trade shows, lobbies, window displays |
| Extra Large | 28 x 44 in | Large retail displays, outdoor boards |
| Tri-Fold | 36 x 48 in (unfolded) | Science fairs, trade shows, presentations |
Note that tri-fold boards are 36×48 inches when fully open but fold down to a portable 12×48 or 16×48 for transport. These are the boards commonly used for science fairs, academic presentations, and trade show tabletop displays.
Key Takeaway: Normal Poster Board Sizes
The normal poster board size is 22×28 inches. Foam core boards typically come in 20×30 or 24×36. Tri-fold display boards measure 36×48 inches unfolded. Each type has its own size standard built around its primary use case.
These are two different animals, and their standard sizes reflect different use cases.
These are the thin, flexible boards made of cardstock-weight paper. They are the boards most people used in school projects. Standard sizes are 22×28 and occasionally 24×36. They are lightweight, inexpensive, and easy to cut. They do not stand on their own. They need a frame, an easel, or to be mounted on a wall.
Foam core is a sandwich of polystyrene foam between two layers of paper or plastic. It is rigid. It stands on its own with minimal support. It holds pins and tape well. Standard foam core sizes in the U.S. are:
Foam core boards sold in craft stores like Hobby Lobby or Michael’s are typically 20×30 inches. That is the size that fits their standard packaging. Commercial suppliers sell foam core in 24×36, 30×40, and full sheets depending on the application.
Tri-fold boards have become a staple of science fairs, school presentations, and trade show tabletop displays. A standard tri-fold board measures 36 inches tall by 48 inches wide when fully unfolded. Folded, it becomes a three-panel display that stands upright on its own.
Some tri-fold boards are 36×48, others are 48×36 depending on orientation. The most common configuration is three panels: a center panel of 22×28 and two side panels of 11×28 each, totaling 44×28 for the panel area (the hinge adds a bit of width).
For trade show applications, tri-fold boards are a simple, cost-effective way to create a standing display without complex hardware. They work on any flat surface, fold flat for storage and transport, and are available in white, black, and other colors.
Retail is a big user of poster boards. The grocery industry in particular has standardized around a few key sizes for in-store promotional signage. Here is what we see most often:
| Retail Signage Type | Standard Size | Typical Location |
|---|---|---|
| Shelf talker | 3.5 x 5.5 in | Product shelves |
| Counter card | 8.5 x 11 in | Checkout counters |
| Floor stand insert | 22 x 28 in | Aisle ends, entrances |
| Window cling / poster | 24 x 36 in | Storefront windows |
| Wall mounted banner | 24 x 60 in | High walls, ceilings |
The 22×28 is so dominant in retail that most major chain stores order their promotional signage in this format and use off-the-shelf floor stands that accommodate it. If you want your posters to work with existing retail infrastructure, 22×28 is the size to use.
Thickness matters in poster boards. Paper poster boards are typically 0.024 to 0.030 inches thick. That makes them flexible. They can bow or curl in humid environments. They are not suitable for freestanding displays without support.
Foam core boards are typically 3/16 inch (4.8 mm) or 1/2 inch (12.7 mm) thick. The 3/16 inch is the most common in retail and craft applications. It is rigid enough to stand unsupported for short spans and light enough to hang without heavy hardware. The 1/2 inch is used for archival, gallery, and heavy-duty applications.
Corrugated plastic boards (also called Coroplast) are popular for outdoor signage. They come in 4mm and 6mm thickness and are sold in 4×8 foot sheets for cutting. They are weather resistant, lightweight, and hold up well in outdoor conditions without lamination.
Outdoor vs. Indoor: Pick the Right Board Material
Paper poster boards are for indoor use only. They curl, warp, and disintegrate in any moisture. For outdoor campaigns, use Coroplast, weather-resistant foam core with a water-resistant laminate, or printed vinyl. Choosing the wrong material wastes money and kills your campaign’s shelf life.
Here is how we think about matching poster board size to campaign needs:
Use a standard 22×28 paper poster board or a tri-fold display board in 36×48. Both are widely available and inexpensive. The tri-fold is better for presentations where the board needs to stand on its own.
For indoor venues, 22×28 paper boards or 20×30 foam core are both good options. For a more polished look, print on photo paper and mount to foam core. The result is professional and durable.
Stick to 22×28 if you want to use standard floor stands and display fixtures. This size is what the fixture industry has standardized on, and it keeps your material costs low by allowing off-the-shelf hardware.
Use 24×36 or 30×40 foam core for individual display panels. For tabletop displays, a tri-fold at 36×48 is the standard. For a full-scale booth backdrop, you are looking at custom banner material or a pop-up display system rather than standard poster boards.
Knowing the right normal poster board size is the starting point. Knowing where to get it, how to use it, and what to watch out for makes the difference between a project or campaign that works and one that creates problems in production.
For single boards or small quantities (up to 25), retail stores are the most practical source. Walmart, Target, Staples, Office Depot, and Michael’s all stock the 22×28 in white, black, and assorted colors. Prices range from $0.75 to $2.50 per board at retail. Tri-fold boards at 36×48 retail for $4 to $8 per unit at the same stores.
For quantities of 25 or more, a sign supply company or educational supply vendor offers better unit pricing. School Specialty, US School Supply, and commercial sign distributors carry the 22×28 in case quantities of 25 or 50 at prices 30 to 50% below retail per unit. For foam core and rigid board materials, a commercial framing supplier or sign shop is the right source.
The 22×28 poster board is fragile at the corners. Transport flat whenever possible, with boards stacked and protected by cardboard on top and bottom. Do not roll 22×28 poster boards. The paper will crease along the fold and may crack. For transporting finished displays, use a flat corrugated box slightly larger than 22×28. For tri-fold boards, the folded position is the safest transport configuration because the folded panels protect the surface area.
The most common method for mounting a print to a poster board is spray adhesive. Apply the adhesive to the back of the print, let it tack for 20 to 30 seconds, then press the print to the board from the center outward to avoid bubbles. For a more permanent and professional result, use a dry mount press, which uses heat and pressure to bond the print to the board without bubbles or edges lifting over time. Cold laminate adhesive sheets are another option for a clean, bubble-free mount.
The 22×28 fits most standard retail sign holders, floor-standing display frames, and point-of-purchase display hardware. For in-store campaigns, confirm the exact interior dimensions of your specific display hardware before finalizing the board and print dimensions. Most sign holders designed for 22×28 have an interior opening of approximately 21.5×27.5 inches. Design within these interior dimensions to ensure your message is fully visible without being covered by the frame edge.
The normal poster board size is 22 inches by 28 inches. This is the standard size sold in office supply stores, craft stores, and big-box retailers across the U.S. It is used for school projects, retail signage, and event displays.
A tri-fold poster board is 36 inches tall by 48 inches wide when fully unfolded. When folded, it stands upright as a three-panel display. It is the standard format for science fairs, academic presentations, and trade show tabletop displays.
Not exactly. Paper poster boards are typically 22×28 inches. Foam core boards are most commonly 20×30 or 24×36 inches. The sizes differ because the two materials serve different purposes and are sold through different retail and commercial channels.
In retail craft stores, the most common foam core board size is 20×30 inches. In commercial print shops and exhibitions, 24×36 and 30×40 are more common. Full sheets for cutting are sold as 48×96 inches.
Paper poster boards are not suitable for outdoor use. They warp and disintegrate in humidity and rain. For outdoor signage, use Coroplast (corrugated plastic), laminated foam core, or printed vinyl. These materials are designed to handle weather exposure.
Most standard retail floor stands are designed to hold 22×28 inch signs. This is the dominant commercial standard for point-of-purchase displays. Always check the specifications of your specific display hardware before ordering boards.
The most common thickness for foam core boards in retail and craft applications is 3/16 inch (4.8 mm). Heavier-duty applications use 1/2 inch foam core. Thicker boards are more rigid but also heavier and more expensive.
A poster board is a flexible paper-based sheet used for writing, drawing, and mounting printed materials. A foam board is a rigid panel with a polystyrene foam core. Foam boards stand on their own and hold their shape better, but they cost more and are heavier.
Most poster boards are not fed through desktop printers. Instead, you print your design on paper at a commercial print shop and then mount or paste it to the board. Alternatively, you can use adhesive vinyl or printed media that sticks directly to foam core or paper board surfaces.
A standard 22×28 paper poster board weighs approximately 100 to 130 grams per square meter, which translates to a paper weight of roughly 60 to 80 lb text weight in US terms. A single 22×28 board weighs between 50 and 90 grams total, making it easy to carry individually. A stack of 25 boards weighs approximately 1 to 2 kilograms depending on the specific board weight.
For lightweight paper poster boards, removable adhesive strips like Command Strips work well in most indoor environments. For heavier foam core boards, use hook-and-loop adhesive strips or hang the board on picture-hanging hardware attached to the wall. Avoid puncturing paper boards with tacks or staples in the display area, as the holes weaken the board and create tears over time.
At retail stores, the largest commonly available board is the tri-fold at 36×48 when unfolded. Some stores carry 24×36 foam core boards as a specialty item. Beyond that, larger rigid board formats are available through sign supply companies and commercial framing suppliers, not through retail craft or office supply stores. For very large display boards, a sign shop that fabricates custom-sized foam core or PVC board panels is the right source.
The normal poster board size is 22 inches by 28 inches. This is the standard size sold in office supply stores, craft stores, and big-box retailers across the U.S. It is used for school projects, retail signage, and event displays.
A tri-fold poster board is 36 inches tall by 48 inches wide when fully unfolded. When folded, it stands upright as a three-panel display. It is the standard format for science fairs, academic presentations, and trade show tabletop displays.
Not exactly. Paper poster boards are typically 22×28 inches. Foam core boards are most commonly 20×30 or 24×36 inches. The sizes differ because the two materials serve different purposes and are sold through different retail and commercial channels.
In retail craft stores, the most common foam core board size is 20×30 inches. In commercial print shops and exhibitions, 24×36 and 30×40 are more common. Full sheets for cutting are sold as 48×96 inches.
Paper poster boards are not suitable for outdoor use. They warp and disintegrate in humidity and rain. For outdoor signage, use Coroplast (corrugated plastic), laminated foam core, or printed vinyl. These materials are designed to handle weather exposure.
Most standard retail floor stands are designed to hold 22×28 inch signs. This is the dominant commercial standard for point-of-purchase displays. Always check the specifications of your specific display hardware before ordering boards.
For more on this, explore our experiential marketing.
The most common thickness for foam core boards in retail and craft applications is 3/16 inch (4.8 mm). Heavier-duty applications use 1/2 inch foam core. Thicker boards are more rigid but also heavier and more expensive.
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 24, 2026
August 24, 2026
August 24, 2026
August 24, 2026
August 24, 2026
