---
cssClass: reference
---

## Font size

Obsidian uses both relative and fixed font sizes depending on the context.

- Use `--font-*` (relative) variables in the editor.
- Use `--font-ui-*` (fixed) variables for UI elements.

| Variable            | Default value | Description |
| ------------------- | ------------- | ----------- |
| `--font-text-size`  | `16px`          | Editor font size. Defined by the user under Appearance settings.            |
| `--font-smallest`   | `0.8em`       |             |
| `--font-smaller`    | `0.875em`     |             |
| `--font-small`      | `0.933em`     |             |
| `--font-ui-smaller` | `12px`        |             |
| `--font-ui-small`   | `13px`        |             |
| `--font-ui-medium`  | `15px`        |             |
| `--font-ui-larger`  | `20px`        |             |

## Font weight

| Variable            | Default value |
| ------------------- | ------------- |
| `--font-thin`       | `100`           |
| `--font-extralight` | `200`           |
| `--font-light`      | `300`           |
| `--font-normal`     | `400`           |
| `--font-medium`     | `500`           |
| `--font-semibold`   | `600`           |
| `--font-bold`       | `700`           |
| `--font-extrabold`  | `800`           |
| `--font-black`      | `900`              |

## Text formatting

| Variable        | Description             |
| --------------- | ----------------------- |
| `--bold-weight` | Bold text font weight |
| `--bold-color`  | Bold text color       |
| `--italic-color` | Italic text color |

## Line heights

| Variable               | Default value | Description                                                            |
| ---------------------- | ------------- | ---------------------------------------------------------------------- |
| `--line-height-normal` | `1.5`         | Default line height                                                    |
| `--line-height-tight`  | `1.3`         | Used in search results, tree items, tooltips, and other smaller spaces |