Widescreen sets it to 13.333 in x 7.5 in. Both of these options are the same aspect ratio so they will look the same in Normal View, since PowerPoint automatically adjusts the zoom level. Widescreen (13.333 in x 7.5 in.) provides more slide surface area for the content, so that is the best choice for presentations.

10 inches x 5.625 inches

A standard template is almost square, with a 4:3 aspect ratio. If you’re showing a PowerPoint presentation on an older projector, iPad, or tablet, you’ll need a Standard template. For all others projection types, including laptops, TV monitors, or modern projectors, you’ll need a Widescreen 16:9 template.

“4:3” and “16:9” refers to the aspect ratio of the slide. But the actual size of a slide with the same aspect ratio can differ. A 4:3 slide is 33% wider than it is high. A 16:9 slide is 78% wider than it is high.

Standard Size is preferred when presentation is to be made in smaller spaces such as a meeting room. Compared with this, Widescreen is more compatible with larger spaces such as a convention hall. The aspect ratio of Standard size fits well with the screen size of tablets, old monitors or projectors.

The main difference between the two is the aspect ratio that they use. In contrast, widescreen TVs use an aspect ratio of 16:9 (1.77 wide compared to its height) or greater. It is easy to spot widescreen TVs as they are a lot wider than standard CRTs.

Commonly known as widescreen, 16:9 is used for highly visual content and should be your default choice of size for creating presentations. This is because almost all modern projector screens, televisions, and computers display come in widescreen as a 16:9 layout.