If you want custom dimensions for presentations, posters, or social media content, learning how to change size of Google Slides helps you adjust your slide layout easily.
Change slide size in Google Slides
In Google Slides:
- Open your presentation
- Click on File in the top menu
- Select Page setup
- Click the dropdown menu (usually “Widescreen 16:9”)
- Choose:
- Standard (4:3)
- Widescreen (16:9)
- Widescreen (16:10)
- Custom
Use custom slide size
- Select Custom
- Enter your preferred dimensions
- Click Apply
→ Your slide size will update instantly
Common custom sizes
- 9 x 16 → Vertical/mobile content
- 8.5 x 11 → Document-style layout
- 4 x 5 → Social media graphics
Why change slide size
- Create content for different platforms
- Improve presentation formatting
- Design posters, reels, or infographics
Quick tip
After changing slide size, review your text and images because some elements may shift or resize automatically.
