---
title: "FontWeight"
description: "FontWeight Namespace"
---
The **FontWeight** namespace contains constants for various font weights, following the CSS specification.

## Constants

The following constants are available in the **FontWeight** namespace. They are all unitless `float` values.

| Name | Value | Description |
| ---- | ----- | ----------- |
| `thin` | `100` | Thin |
| `extra-light` | `200` | Extra Light |
| `light` | `300` | Light |
| `normal` | `400` | Normal |
| `medium` | `500` | Medium |
| `semi-bold` | `600` | Semi Bold |
| `bold` | `700` | Bold |
| `extra-bold` | `800` | Extra Bold |
| `black` | `900` | Black |

## Example

```slint
export component Example inherits Window {
    Text {
        text: "Hello World";
        font-weight: FontWeight.bold;
    }
}
```