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# Max-width
The `max-width` style sets a maximum width for a widget.
## Syntax
--8<-- "docs/snippets/syntax_block_start.md"
max-width: <a href="../../css_types/scalar"><scalar></a>;
--8<-- "docs/snippets/syntax_block_end.md"
The `max-width` style accepts a [`<scalar>`](../css_types/scalar.md) that defines an upper bound for the [`width`](./width.md) of a widget.
That is, the width of a widget is never allowed to exceed `max-width`.
## Example
The example below shows some placeholders that were defined to span horizontally from the left edge of the terminal to the right edge.
Then, we set `max-width` individually on each placeholder.
=== "Output"
```{.textual path="docs/examples/styles/max_width.py"}
```
=== "max_width.py"
```py
--8<-- "docs/examples/styles/max_width.py"
```
=== "max_width.tcss"
```css hl_lines="12 16 20 24"
--8<-- "docs/examples/styles/max_width.tcss"
```
1. This won't affect the placeholder because its width is less than the maximum width.
## CSS
```css
/* Set the maximum width to 10 rows */
max-width: 10;
/* Set the maximum width to 25% of the viewport width */
max-width: 25vw;
```
## Python
```python
# Set the maximum width to 10 rows
widget.styles.max_width = 10
# Set the maximum width to 25% of the viewport width
widget.styles.max_width = "25vw"
```
## See also
- [`min-width`](./min_width.md) to set a lower bound on the width of a widget.
- [`width`](./width.md) to set the width of a widget.
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