---
title: Responsive Embed
description: Wrap embedded content like videos, maps, and calendars in a responsive embed container to maintain the correct aspect ratio regardless of screen size.
sass: scss/components/_responsive-embed.scss
tags: flex video 'flex video'
video: GxUsloI_qnQ
---
To make sure embedded content maintains its aspect ratio as the width of the screen changes, wrap the `iframe`, `object`, `embed`, or `video` in a container with the `.responsive-embed` class.
```
---
## Aspect Ratios
Add ratio classes to change the aspect ratio of responsive embeds. The default ratio is 4:3. The `.widescreen` class will change the container's aspect ratio to 16:9.
```
The ratio classes are generated by the keys in the `$responsive-embed-ratios` map in your settings file. Only the `default` key is required. You can, for example, make your default ratio 16:9, remove widescreen, and add other aspect ratios.
```scss
$responsive-embed-ratios: (
default: 16 by 9,
vertical: 9 by 16,
panorama: 256 by 81,
square: 1 by 1,
);
```
Watch this part in video
