Poster Size Guide: All Standard Sizes in Inches & CM

In a time where we are used to seeing digital formats, posters continue to be an effective and highly impactful marketing tool for businesses to share information. 

Whether you are designing a poster for decorative purposes or for advertising and marketing campaigns, the most important thing is to know how to scale your poster to escalate its impact. Knowing this adds an extra element of professionalism to any project. However, it is important to conceptualize the perfect poster size for your project.

As a full service commercial printing and packaging company, nothing like this surprises us anymore. We created this detailed guide to help designers and buyers easily find out the most common poster sizes and compare them to one another to find the perfect one for their project. 

This guide covers all major standard poster sizes in inches and centimeters to help you compare dimensions in different formats. We’ll simplify the process of finding the perfect dimensions that might seem technical to you. Let’s discuss how the right size of poster improves visibility and overall presentation. 

What Is Standard Poster Size? 

Let’s find out what is a typical poster size. Well, there’s no single universal size when it comes to poster dimensions. Different industries and projects in the USA require different poster dimensions. However, some standard poster dimensions dominate the USA market due to their practicality, framing compatibility, and easy printing.  Like the posters we also have covered an array of variants like how big is a standard business card? So. you know the exact sizes.

If you are wondering, what size are posters normally? These standard sizes are considered industry favorites for movie theaters, retailers, businesses, and personal wall decor. The most common poster sizes include:

• Small Poster Size: 11x17 inches and 27.9 x 43.2 cm

• Medium Poster Size: 18x24 inches and 45.7 x 61 cm 

• Large Poster Size: 24x36 Inches and 61 x 91.4 cm

• Movie Posters: 27x40 inches and 68.6 x 101.6 cm

If you are still wondering, “What is a normal poster size”? In most cases, 24” × 36” is considered the average poster size because it offers enough space for printing. 

What Are the Most Common Poster Sizes in the USA?

Let’s first have a look at the most common standard poster size chart to help you choose the right format based on your design requirements and viewing distance: 

It is important to understand that the poster dimensions cm and inches depend on the marketing purpose and the viewing distance. These standard poster dimensions not only help you choose the right format but also make poster printing easier because printers can be set to the exact poster size quickly and accurately.

Now is the time to explain how different poster sizes are designed for different purposes, their applications, and benefits:

8.5x11 Inches (Letter-Sized Poster)

Dimensions: 216 × 279 mm

Pixels (300 PPI): 2550 × 3300 px

International Size: A4 (210 × 297) mm (8.267 × 11.69) inches

Letter size posters are the smallest poster size. They are commonly used for:

• Announcements

• Flyers

• Bulletin boards

• Schedules

• Menu boards

• Reception areas

It is best to balance design and text elements to make them visible and readable. Businesses should use bold headings with minimal text and simple graphics. 

11 × 17 Inches (Small Poster Size)

Dimensions: 279 × 432 mm

Pixels (300 PPI): 3300 × 5100 px

International Size: A3 (297 × 420) mm (11.69 × 16.53) inches

These are also known as small poster sizes. 11 x 17 poster sizes are slightly larger than the letter size posters. They are commonly used for:

• Local advertising

• Indoor events

• Collectible artwork

• Libraries

These posters offer enough space for eye catching printing and to include important dates or a call to action. They are mostly used for local cafes and college campuses. These places have limited space, so this size of poster is considered an ideal option. 

18 × 24 Inches (Medium Posters)

Dimensions: 457 × 610 mm

Pixels (300 PPI): 5400 × 7200 px

International Size: B2 (500 × 707) mm (19.68 × 27.83) inches

Understanding 18x24 poster size comparison is important as it helps you see how medium format posters impact visibility and cost for event and retail displays. These posters are commonly used for:

• Event advertising 

• Promotional displays

These posters are designed to offer maximum visibility on windows, bulletin boards, and walls. They are considered a go-to choice for concerts, athletic teams, and school clubs. From our experience, we advise using centered graphics with bold headers to draw maximum attention and make them easily readable.  Same like posters knowing the envelope sizes are also integral so there is no confusion around. 

If you’re in a questionable state of how big is a poster board will be for a medium sized poster, then know that the poster board measures around 22 × 28 inches. This offers a 2 inches border around all sides and is considered perfect for school projects and signs. 

24 × 36 Inches (Large Size Posters)

Dimensions: 610 × 914 mm

Pixels (300 PPI): 7200 × 10800 px

International Size: A1 (594 × 841) mm (23.38 × 33.11) inches

23 × 36 inches poster size is considered standard size for large format posters. This size of poster is commonly used at:

• They are used at trade shows, retail store windows, and in mall corridors for advertising. 

• Auditorium and lobbies for special announcements. 

• Large wall spaces for home decor purposes. 

This poster size is considered highly effective for advertising and marketing. They are designed to make a bold impression and command attention.  Along with posters we also imprint custom postcards tailored to significance making your brand standout. They are designed to attract attention instantly in high traffic areas. They offer maximum visibility in these busy areas.

27 × 40 Inches (Movie Posters)

Dimensions: 686 × 1016 mm

Pixels (300 PPI): 8100 × 12000 px

International Size: B1 (707 × 1000) mm (27.83 × 39.37) inches 

This is the perfect size for classic movie posters. Film poster sizes are large which makes them instantly noticeable and recognizable. Common uses includes: 

• Displayed in cinemas for advertising movies.

• Displayed on bus stops to advertise new releases

To boost the visibility of standard movie poster size, it is recommended to use large text with a strong focus on graphics. Alongside posters, many brands also use high quality custom printed boxes for specific advertising purposes. 

36 × 48 Inches (Large Format Posters)

Dimensions: 914.4 × 1219.2 mm 

Pixels (300 PPI): 10800 × 14400 px 

International Size: A0 (841 × 1189) mm (33.1 × 46.8) inches

36 × 48 Inches are a highly impactful poster size option. This size of poster is usually considered an ideal option for highly detailed promotions. Their primary applications involve:

• They tend to stand out in crowded exhibition halls.

• They are used for outdoor campaigns. 

• They are used as maps in larger public areas. 

This poster size is perfect for high traffic areas where viewers stand at least 6 to 9 feet away. This allows them to easily see the full layout of the poster and understand the purpose of the advertising campaign. 

40 × 60 inches (Bus Stop Poster Size)

Dimensions: 1016 mm × 1524 mm

Pixels (300 PPI): 12000 px × 18000 px

International Size: B0 (1000 × 1414) mm (38.4 × 55.7) inches

Many professionals use 40 × 60 inches for outdoor advertisements. They serve as the standard poster size for billboard advertising. They are also often referred to as “bus stop posters”. Viewers must be at least 10 feet away from the poster to easily view it. They are heavy duty and weather resistant roadside billboard sized posters. 

What is the Size of a Poster Board?

Finding out the standard poster board size is very important. The size of the poster board depends on where and how it is used. Along this one on poster, we have also written the business card dimensions in inches and cm through our remarkable informative guide.  Let’s find out the typical poster board sizes:

• 14” x 22”: This poster board size is ideal for small posters and is used for kids’ crafts and store window pricing. 

• 20” x 30”: This medium display poster board size is used for framing exhibits. 

• 22” x 28”: This is the standard poster board size, which is mostly used for school projects, presentations, and display boards. 

Choosing the right display material matters just as much as poster board size. There are three types of display materials:

• Poster paper: It’s a lightweight material for printing. It is used for promotional posters. It is affordable and available in multiple finishes. 

• Foam board: Foam board is also lightweight but sturdy and highly rigid. It offers professional appearance to posters which makes them ideal for exhibitions and trade shows.

• Poster board: Poster board is also a thicker paper based poster board. They are stronger than poster paper.

Understand Poster Resolution and Print Quality

Understanding poster resolution is also very important to create a well designed poster that conveys your message in a clear and professional way. Low quality images can make the poster appear blurry or stretched after printing. That’s where understanding DPI, print settings, and pixel dimensions save you from such costly printing mishaps. Let’s have a look at them:

DPI (Dots per inch) 

DPI stands for dots per inch, which is used to measure printing resolution. It shows the number of dots of ink a printer produces on paper. For professional poster printing results, a minimum of 300 DPI is considered industry standard. It helps produce sharp and clear printing results. Lower DPI reduces printing sharpness when it comes to large posters.

Pixels Dimensions

Pixels' dimensions are equally important as DPI. It is necessary to understand that the larger poster sizes normally require higher pixel counts.

Print Sharpness

Professional poster printing uses the CMYK color mode. CMYK provides more accurate print colors. Check up on designers to make sure they have added the bleed areas and safe print margins to ensure the artworks don't get trimmed. 

International (ISO) vs US Poster Sizes

Poster sizes vary in the USA and international markets. That’s because both of these regions follow different measurement systems. Many countries use ISO-A series for poster measurements, whereas in the USA, poster dimensions are measured in inches. ISO poster dimensions rely on the constant aspect ratio of 1:1.414. 

The ISO poster sizes include:

1. A0: (841 × 1189) mm (33.1 × 46.8 ) inches

2. A1: (594 × 841) mm (23.4 × 33.1) inches

3. A2: (420 × 594) mm (16.5 × 23.4) inches

4. A3: (297 × 420) mm (11.7 × 16.5 inches)

A0 is the standard size for large posters, while A3 is considered small and is used for indoor posters. If you are searching for a large format poster size for printing, A0 is your best option. 

What Are the Common Printing Aspect Ratios

Printing aspect ratios are used to define the proportional relationship between the width and height of a print. They help determine if the image fits the page or not. 

Common aspect ratios include:

• 2:3 ratio: This aspect ratio is considered ideal for large and cinema poster sizes. For example, 24 × 36 inches.

• 3:4 ratio: Ideal for framing and art prints. For example, 18 × 24 inches. 

Use this formula to find the perfect poster aspect ratio:

Aspect ratio = Width ÷ Height

For example =  18 ÷ 24 = 3:4

Why Does Poster Aspect Ratio Matter?

As we have already stated, the poster’s aspect ratio shows the relationship between its width and height. Therefore, it is extremely important to choose the perfect aspect ratio because it affects how your design will look when printed. Below are the reasons why you should choose the right poster aspect ratio:

• Prevent Cropping Issues: A correct aspect ratio helps prevent important design elements from being cut off during the printing process. 

• Allow Easier Framing: Poster aspect ratios fit available poster frame sizes option. 

• Professional Look: Proper proportions help posters look professional and instantly grab attention with large and clear headings. 

• Save Time and Cost: A correct aspect ratio helps prevent last minute design adjustments and cost reprints. 

How to Choose The Right Typical Poster Sizes?

You must be like, “What is the typical poster size?” and when you get your answers, the next question is, “What are good poster dimensions?” We have compiled this detailed poster sizing guide to answer all of our queries. Here’s how you choose the perfect size 

• Viewing Distance: It is important to consider the viewing distance when it comes to choosing the right poster size measurements. Determine if it’ll be viewed from a distance or if it's for close viewing. 

• Based on Placement: Determine where you’ll be placing the poster. If you plan to use it for small spaces, like retail walls or bulletin boards, you can use small to medium sized posters. If you want to use them for outdoor spaces then a movie poster size will be a perfect fit. 

• Design Complexity: Posters with detailed graphics or large images require large size posters for maximum visual impact. This also helps improve readability. 

In a Nutshell

Now this will help you understand what is poster size and how different sizes affect visual impact. It all came down to choosing the right poster sizes to create effective and visually appealing displays. This guide explored the most common poster sizes, and they are used for different needs. 

The right size makes your message readable and the design more effective. If you are looking for premium quality custom poster printing services in the USA, collaborating with Print247 will be a better idea. Print247 will help you navigate through the most confusing process of choosing between different standard poster sizes to maintain the best printing quality. 

Frequently Asked Questions

What is the standard movie poster size?

The standard size for a movie poster is 27 × 40 Inches.

What is the ideal resolution for large poster sizes?

300 DPI is the best target for sharp and professional print quality. Large posters should be at least 7200 × 10800 pixels.

What is the ideal size frame for a 24×36 poster?

A 24×36 inch frame is considered a perfect fit for 24×36 posters. 

Which poster size works best for bedrooms? 

An 18×24 inch (medium size) poster size works perfectly well for bedroom decoration.