> For the complete documentation index, see [llms.txt](https://docs.novarietygames.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.novarietygames.com/websitecreator/css-interpreter/border-size.md).

# border-size

The **`border-size`**CSS property defines the elements border size

Example

```css
border-size: 5; /* this does not use px or % */
```