Quick Scoop

A PowerPoint slide is usually **16:9 widescreen** , which is the default in modern PowerPoint, and the older **4:3 standard** size is still available. Microsoft also lets you set a **custom slide size** if you need something specific.

Common sizes

FormatTypical size
Widescreen (16:9)13.33 in × 7.5 in
Standard (4:3)10 in × 7.5 in
Microsoft Support says you can choose **Widescreen (16:9)** , **Standard (4:3)** , or **Custom Slide Size**.

How to check it

  1. Open PowerPoint.
  2. Go to the Design tab.
  3. Click Slide Size near the right side.
  4. Pick Widescreen , Standard , or Custom Slide Size.

If you want, I can also tell you the best slide size for printing, Google Slides, or a TV/projector.