How to Change Slide Size in Powerpoint [Step-by-Step]

November 1, 2023 2.4K views

Changing the slide size in PowerPoint is a simple way to improve the presentation of your content. Whether you have a lot of text or images, choosing the right slide size can help you to create a more visually appealing and professional presentation. This article will provide you with a complete guide on how to change the slide size in PowerPoint and choose the right slide size for your content. Keep reading to learn more!

Part 1 The Importance of Slide Size in Powerpoint

Slide size

Choosing the right slide size is crucial for an effective presentation. It impacts aesthetics, content clarity, and audience comprehension. Incompatible sizes may distort or truncate content, harming your message. Consider content type; detailed content may require larger slides, while simpler messages suit smaller ones. Also, mind the aspect ratio (e.g., 4:3 or 16:9) to maintain professionalism and visual appeal.

Tips for Choosing the Right Slide Size for Your Presentation

Choosing the right slide size for your presentation is crucial, as it can significantly impact how your content is displayed and how effectively you communicate your message. Here are some tips on selecting the appropriate slide size based on different situations:

Standard (4:3) Slide Size:

When to Use: This is the traditional slide size used in most presentations. It's suitable for general use, especially when you're unsure about the projection equipment.

Aspect Ratio: 4:3

Advantages: Universally compatible, works well on older projectors, and standard screen displays.

Widescreen (16:9 or 16:10) Slide Size:

When to Use: Opt for widescreen sizes when presenting on modern high-definition displays or projectors. It provides a cinematic and modern look.

Aspect Ratios: 16:9 or 16:10

Advantages: Ideal for showcasing images and videos, fits modern screens perfectly, and offers a contemporary design.

Letter Paper (8.5x11 in) Slide Size:

When to Use: If you plan to print your slides as handouts or want to ensure your presentation fits on standard letter-sized paper.

Advantages: Suited for printed materials and easy to distribute as handouts.

A3 and A4 Paper Slide Sizes:

When to Use: Common in international presentations, choose A3 or A4 sizes based on your regional standard. A3 is larger and may be preferable for poster-like presentations.

Advantages: Adheres to international paper standards, useful for presentations abroad.

B4 and B5 (ISO) Paper Slide Sizes:

When to Use: Similar to A3 and A4 but based on ISO paper sizes. Choose these sizes for international compatibility.

Advantages: Conforms to ISO standards, suitable for global presentations.

Overhead and Banner Slide Sizes:

When to Use: These specialized sizes are designed for specific presentation situations. Overhead is suitable for projectors with transparent sheets, while banners are for wide-format displays.

Advantages: Tailored for unique presentation scenarios.

35 mm Slides:

When to Use: If you're using older equipment that requires 35 mm slides, use this size for compatibility.

  1. Advantages: Suitable for legacy systems and retro-style presentations.




On-screen Show (4:3)

10 in / 25.4 cm

7.5 in /19.05 cm

Letter Paper (8.5x11 in)

10 in / 25.4 cm

7.5 in /19.05 cm

Ledger Paper (11x17 in)

13.319 in / 33.831 cm

9.99 in / 25.374 cm

A3 Paper (297x420 mm)

14 in / 35.56 cm

10.5 in / 26.67 cm

A4 Paper (210x297 mm)

10.833 in / 27.517 cm

7.5 in /19.05 cm

B4 (ISO) Paper (250x353mm)

11.84 in / 30.074 cm

8.88 in /22.556 cm

B5 (ISO) Paper (176x250mm)

7.84 in /19.914 cm

5.88 in / 14.936 cm

35 mm Slides




11.25 in / 28.575 cm

7.5 in /19.05 cm


10 in / 25.4 cm

8 in / 20.32 cm

On-screen Show (16:9)

10 in / 25.4 cm

5.625 in / 14.288 cm

On-screen Show (16:10)

10 in / 25.4 cm

6.25 in / 15.875 cm

This table provides a quick overview of various slide sizes and their dimensions.

Part 2 How to Change Slide Sizes in Powerpoint [Step-by-Step]

Step 1: Open your PowerPoint presentation.

Step 2: Click on the "Design" tab located in the Ribbon at the top of the screen.

design tab

design tab

Step 3: In the "Design" tab, navigate to the "Slide Size" option. You'll find it in the "Customize" group on the right-hand side of the screen.

slide size

slide size

Step 4: When you click on "Slide Size," a dropdown option will display. Here, you can choose from several preset slide size options or select "Custom Slide Size" to enter your own dimensions.

If you choose a preset option, simply click on it to apply the selected slide size to your presentation.

pick option

pick option

If you prefer a custom slide size, select "Custom Slide Size." A dialog box will appear, allowing you to enter your desired dimensions.

custom size

custom size

Step 5: After configuring your slide size settings, click "OK" to apply the changes to your presentation.

Fixing Common Issues with Slide Size

While creating or presenting your PowerPoint, you may face some common slide size problems. Here's how to solve them:

  • Content too small or large: Adjust slide size for readability and proportion.

  • Content cropped or distorted: Use "Maximize" or "Ensure fit" when changing size.

  • Text/images pixelated: Ensure high-res visuals and adjust slide size.

  • Slides don't fit screen: Use "Scale to Fit" in "Slide Show" tab to match screen size.

Part 3 How to Customize a Slide Size in PowerPoint

Step 1: Open your PowerPoint presentation. Navigate to the Ribbon's Design tab.

 design tab

design tab

Step 2: Click on Slide Size in the Customize group on the right-hand side of the screen.

pick slide size

pick slide size

Step 3: Choose Custom Slide Size on Windows or PowerPoint on the web, or Page Setup on Mac.

custome slide size

custome slide size

Step 4: Adjust the sizes in the Width and Height boxes to your exact measurements. You may enter the sizes manually or use the arrows to make minor changes up or down > Click OK

Click OK

Click OK

Step 5: On Windows or PowerPoint online, pick Maximize or Ensure Fit. On Mac, pick Scale or Don’t Scale.



Part 4 How to Change the Orientation of Your Slides in PowerPoint

Step 1: Open your PowerPoint presentation.

Step 2: Navigate to the "Design" tab.> Click on the "Slide Size" button.

Click on the

Click on the "Slide Size" button.

Step 3: Choose "Custom Slide Size" at the bottom of the menu.


Choose "Custom Slide Size"

Step 4: In the "Slide Size" dialog box, select your preferred orientation: "Portrait" or "Landscape."

pick option

pick option

Step 6: Click "OK" to apply the new orientation to your presentation.



Part 5 Free Alternative to Powerpoint —— WPS Office

WPS Office

WPS Office

It's important to highlight that the methods discussed above can be applied in both WPS Office and MS PowerPoint, offering users flexibility and convenience. However, when considering WPS Office as a free alternative, there are several notable benefits:

  1. Templates: WPS Office offers a wide range of templates suitable for various slide sizes and styles.

  2. User-Friendly: It has an easy-to-use interface suitable for all levels of users.

  3. Compatibility: It works well with PowerPoint files, ensuring seamless collaboration.

  4. Customization: You can customize slides, themes, and designs to match your preferences.

  5. Cross-Platform: Access and edit your slides from different devices.

  6. Cost: WPS Office is entirely free, making it a budget-friendly choice.

  7. Updates: Regular updates provide the latest features and security enhancements.

    WPS Office- Free All-in-One Office Suite
    • Use Word, Excel, and PPT for FREE, No Ads.

    • Edit PDF files with the powerful PDF toolkit.

    • Microsoft-like interface. Easy to learn. 100% Compatibility.

    • Boost your productivity with WPS's abundant free Word, Excel, PPT, and CV templates.

    5,820,008 User
    Algirdas Jasaitis


Can I only change the size of one slide in powerpoint?

No, PowerPoint doesn't allow resizing individual slides within a presentation. All slides in a presentation are of the same size.

How to choose the right orientation of slides for your presentation?

Selecting the appropriate slide orientation depends on your target screen or device. For instance, if you're creating a presentation for mobile devices, using portrait orientation can enhance readability.


In this comprehensive guide to adjusting slide sizes in PowerPoint, we've explored the pivotal role that choosing the right dimensions plays in enhancing your presentations. It's akin to tailoring a suit - the fit matters. Furthermore, we've walked you through the practical steps for resizing, addressing common hiccups you might encounter along the way.

Introducing WPS Office as a noteworthy alternative, it not only offers these functionalities but also boasts an assortment of templates and an intuitive interface. Plus, it seamlessly integrates with PowerPoint files, adding a layer of convenience to your workflow. And with its cost-effectiveness and regular updates, WPS Office emerges as a trustworthy companion for your presentation endeavors in 2023.

15 years of office industry experience, tech lover and copywriter. Follow me for product reviews, comparisons, and recommendations for new apps and software.