Traditional marketing
Poster Design: How to Make a Poster People Can Read from Across the Room
The 1 inch per 10 feet rule backed by the ADA math, the standard sizes print shops actually stock, a QR code people can scan and event poster examples that make sense in three seconds.
Good poster design starts with distance: where people will stand when they read it decides the paper size and the type size. A poster gets understood in three seconds when it carries one idea, a headline of about seven words, capital letters 1/8 inch tall for every foot of viewing distance and one clear action.
In 2026, we asked ChatGPT how big a poster headline must be to read from 10 feet away. It said about 1 inch. We checked it against the ADA standard for signs: 1.1 inches at 10 feet, close enough, but 4.9 inches at 40 feet, where the same rule gives only 4. Below you get a table that holds at any distance, the standard sizes and the steps.
Sizes, type, steps, QR codes and examples: this guide is part of our traditional marketing section.
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What Is Poster Design? Types of Posters and What They Do
It is the craft of laying out a printed sheet so people passing by understand it at a glance and act on it.
A poster is a single-sided printed piece, letter size or larger, hung in a place people walk past to announce, inform or invite. Poster design is the work of arranging its headline, image and details so the message reads standing up, from a distance and in seconds. Hierarchy is everything: the key point huge, the rest small.
What it is not: a poster is not a flyer, which you hand out and people read up close, and not a brochure, which folds and gets read in full (for that, see how to make a brochure). It is not a storefront sign or a billboard either; that is billboard advertising, rented from a media owner.
| Types of posters | Goal | Example |
|---|---|---|
| Promo or window poster | Get passers-by to walk in | "Buy one latte, get one free until 11 a.m." |
| Event poster | Get people to save the date and show up | Concert, workshop, grand opening |
| Informational poster | Tell people something or set a rule | New hours, safety notice, store move |
| Campaign poster | Change a habit or get sign-ups | Health campaign, food drive |
Standard Poster Sizes (and Which One to Pick)
Pick from standard poster sizes by the wall and the viewing distance, not by what looks good on your screen.
| Size | Name | Where it works |
|---|---|---|
| 8.5 x 11 in | Letter | Doors, counters, notices read from 3 to 6 feet |
| 11 x 17 in | Tabloid | Windows and bulletin boards: the workhorse |
| 18 x 24 in | Medium | Most event posters, store windows |
| 24 x 36 in | Large | Lobbies, trade shows, big rooms |
| 27 x 40 in | One-sheet | Movie posters and large displays |
What size is a poster?
There is no single size, but the most common are 11 x 17, 18 x 24 and 24 x 36 inches. If you are not sure, an 18 x 24 poster is the safe middle: it fits a 4-inch headline, readable from about 30 feet, and every print shop stocks frames and paper for it. Add 1/8 inch of bleed on each side, so your file is 18.25 x 24.25 inches.
What poster font size do you need?
At least 1/8 inch of capital-letter height per foot of viewing distance, or 1 1/4 inches at 10 feet. The ADA guide from the U.S. Access Board asks for 5/8 inch plus 1/8 inch per foot beyond 6 feet, almost the same. The popular "1 inch per 10 feet" rule works up close but falls short past 20 feet.
| Viewing distance | Capital-letter height | Approximate size in your app | Example |
|---|---|---|---|
| 3 ft | 5/8 to 3/4 in | 65 to 75 pt | Counter, bulletin board |
| 10 ft | 1 1/8 in | 115 pt | Window seen from the sidewalk |
| 20 ft | 2 3/8 in | 245 pt | Lobby, trade show aisle |
| 40 ft | 4 7/8 in | 500 pt | Gym, warehouse, large hall |
Points are a guide: in most typefaces, capitals are about two thirds of the point size. Always measure the printed proof.
How to Make a Poster, Step by Step
Decide where it will be read from, write one idea and build it from biggest to smallest: headline, visual, details, action.
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Measure the viewing distance
Stand where your customer will be (the sidewalk, the door, the aisle) and measure to the wall. That number picks the size and the type.
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Write one idea in seven words
"Tacos $2 every Tuesday" works. "Tacos, burritos, catering, events and patio seating" gets read by nobody.
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Choose the size and set the type
Use the table: from 10 feet, a 1 1/8-inch headline and at least 11 x 17; from 20 feet, 2 1/2 inches and 18 x 24.
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Build three levels
Headline huge; key details (date, price, place) about half that; terms and logo small at the bottom.
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Use contrast and one visual
Dark on light or the reverse, no text over busy photos. Bold, plain type.
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Add a QR code you can track
Point it to its own page with UTM tags, not your homepage. Place it at hand height with "Scan to..." next to it.
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Prepare the file for print
PDF at final size, 1/8 inch of bleed, images at 300 ppi and text at least 1/4 inch from the trim.
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Run the distance test
Print it small or look at the screen from across the room for three seconds. If you cannot tell what it is about, simplify.
Poster Layout and Design Ideas That Read from a Distance
A strong poster layout is hierarchy plus contrast: the most important thing biggest, and nothing that forces people to walk up to get it.
- Type: bold and plain for the headline, two font families at most. Sentence case reads better than all caps.
- Color: two or three, with strong contrast. If your brand has a mood board, pull the palette from there instead of improvising.
- Visual: one, large and sharp. If text sits on it, put it over a calm area.
- White space: at least a third of the poster. It is what makes the headline stand out.
Poster design ideas that work for small businesses are simple: one oversized product photo, one bold color block with a short headline, or a big number ("$2 tacos") as the hero.
How big should a QR code on a poster be?
About one tenth of the scanning distance, a practical rule QR makers repeat. To scan from 3 feet, make it about 4 inches; on a window where people walk up, 1.5 to 2 inches is enough. A qr code on poster layouts works best at hand height with a short label. Make yours with our QR code generator and test it with two different phones before printing.
How to Design a Poster in Canva, Word or Google Docs
If you want to know how to design a poster without design skills, an online editor with templates is the fastest route; Word and Google Docs are fine for simple notices.
- Canva or Adobe Express: search "poster," pick the size, swap in your headline and set the type from the table. Download as PDF Print with crop marks and bleed.
- Word: Layout, then Size, then More Paper Sizes, and set 11 x 17 or your custom size. Headline at 115 pt or more, then save as PDF.
- Google Docs: File, then Page setup, and pick Tabloid (11 x 17). Fine for simple notices; for bigger posters, use a design app.
AI Poster Generator: What It Does Well and Where It Breaks
An AI poster generator turns a text prompt into an image or a ready-made layout. Adobe Express, for example, lists three tools on its poster page: generate an image, generate a template and generate a text effect. Canva, Microsoft Designer and Design.com offer similar generators.
The weak spot to plan around is text, since letters and dates can come out misspelled or wrong. So split the job:
- Ask for the visual only. Try: "Portrait image, warm café interior, soft light, empty space in the top third, no text."
- Write the headline yourself in the editor, at the type size from the table above. That avoids misspelled words and wrong dates.
- Check the export size before you print. An 18 x 24 inch poster needs 2,700 x 3,600 pixels at 150 ppi and 5,400 x 7,200 at 300.
- Proofread every number. A wrong price or date on a printed poster is yours to fix.
- Run the three-second test. AI layouts love clutter, so cut whatever does not help someone act.
One point for brands: the U.S. Copyright Office said in its January 2025 report that prompts alone do not make you the author of what an AI produces, while your own edits and arrangement can be protected. Put your logo, colors and wording on top of every AI image.
Where to Print Posters (and What to Ask Before You Pay)
You have three routes, and the right one depends on how many posters you need and how soon.
| Route | Best for | Watch out for |
|---|---|---|
| Print from your design app | One or two posters, no file hassle | Adobe Express offers print ordering only in the US, UK, Australia and Canada |
| A copy-and-print chain (Staples, FedEx Office, Office Depot) | A close deadline and a store nearby | Fewer paper choices; small runs cost more per piece |
| A local print shop or online printer | 25 or more posters, brand-color matching | Quotes and proofs take longer |
Ask every shop for the same three things: the size with bleed, the paper and finish, and the price at your quantity. Then compare price per square foot. A poster is area, and an 18 x 24 inch sheet is 3 square feet.
Here is a made-up example. A chain quotes $24 for one 18 x 24. A local shop quotes $150 for 50. That is $8 per square foot against $1, which is why one-off prices say little about a campaign.
Send a PDF at final size with 1/8 inch of bleed, the figure Adobe Express suggests, and ask for a proof if color matters. Pick matte for windows, since it reflects less light, and lamination for anything people will touch.
Event Poster Examples (and Mistakes That Ruin Them)
Every good event poster shares the same bones: one idea, a short headline and an action people can take right away.
- Coffee shop in Austin, 11 x 17 window poster: "Fresh pastries at 7 a.m." / "Every weekday" / "Come in and grab one."
- Open mic in Nashville, 18 x 24: "Open Mic Night" / "Thursday, 8 p.m." / "Free entry" + QR to sign up.
- Physical therapy clinic in Phoenix, 18 x 24 informational poster: "New evening hours" / "Monday to Thursday, 4 to 8 p.m." / "Book at the front desk."
Act as a graphic designer. I need a poster for [business] in [city] that will be read from [distance in feet] in [window, bulletin board or event]. Goal: [offer or event with date]. Give me 5 headlines of seven words or fewer, the recommended poster size, the headline type size for that distance, the text hierarchy and where to place a QR code.
Frequently asked questions about poster design
Can ChatGPT make a poster?
Yes, partly. ChatGPT can write your headline options, suggest a layout and generate an image, and some versions can place text inside the image. The weak spot is still text: letters can come out misspelled or uneven, and you rarely get a print-ready file at the right size with bleed. The practical workflow is to use it for ideas and the main visual, then build the final poster in Canva, Adobe Express or a design app, where you control the type, the size and the export.
How do you make a poster on PowerPoint?
Open a blank presentation, go to Design, then Slide Size, and set a custom size such as 18 x 24 inches in portrait. Delete the placeholder boxes, add your headline in a bold font at 150 points or more, place one large image and add the key details below. PowerPoint caps slide sizes at 56 inches, which covers most posters. Export as PDF at the final size and ask your print shop whether they need bleed added before printing.
How do you make a poster from a photo?
Start with the largest original file you have, not a copy from social media, because a poster needs about 300 pixels per inch at its final size. An 18 x 24 inch print at full quality needs roughly 5,400 x 7,200 pixels, though posters viewed from a distance still look fine at 150 pixels per inch. Crop to the poster ratio, leave a calm area for the headline, and add text in a design app. If the photo is too small, choose a smaller size.
What makes a good poster?
A good poster can be understood in about three seconds from where people actually see it. That takes one idea, a short headline in large, bold type, one strong visual, high contrast and plenty of empty space. It also needs a clear next step, like a date to remember, a place to go or a QR code to scan. The best test is to look at it from across the room for three seconds: if you cannot say what it is about, simplify.
What are the elements of a poster?
The core elements of a poster are a headline that reads from a distance, a visual focal point, the key details (what, when, where and price), a call to action and your branding. They work in three tiers of size: the headline biggest, the details about half that size, and the fine print, sponsors or terms small at the bottom for people who walk up. If an element does not help someone decide or act, cut it.
What is the best free program to design a poster?
For most people, Canva or Adobe Express: both have free plans, poster templates in standard sizes and a PDF export for print. Google Slides and PowerPoint work for simple posters if you already know them. If you need professional control over color and bleed, Affinity or Adobe Illustrator are the step up, but they take longer to learn. Whatever you pick, check that it lets you set a custom size and export a high-resolution PDF before you start.
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