> ## Documentation Index
> Fetch the complete documentation index at: https://docs.symmetry.com/llms.txt
> Use this file to discover all available pages before exploring further.
# Make a widget responsive
> Fit a CBS widget into a fixed-width or fluid container.
CBS widgets are **responsive**: a widget stretches to fill the width of its parent element. You control the size by controlling the container.
## Fluid (fill available width)
Placed directly in the page or a full-width element, the widget expands to the viewport width:
```html theme={null}
```
## Fixed width
Wrap the widget in a container with a set width and it fits that width:
```html theme={null}
```
## Tips
* Set the width on the **parent element**, not the script tag. The widget reads its width from the container.
* For side-by-side calculators, see [Multi-calculator](/cbs/widgets/multi-calc).
If a widget isn't sizing the way you expect, see [Widget won't resize in my layout](/cbs/widgets/wont-resize).