# Background Size

Set the background image size within an element.

**Widely available.** This feature is well established and works across many devices and browser versions.

Chrome 21 · Edge 12 · Firefox 9 · Safari 5.1

| Class | Properties | Value |
|-------|------------|-------|
| `bs:auto` | background-size | `auto` |
| `bs:c` | background-size | `cover` |
| `bs:co` | background-size | `contain` |

### Media Queries

Prefix a class with a breakpoint to apply it from that width up.

| Class | Properties | Value |
|-------|------------|-------|
| `bs:auto` | background-size | `auto` |
| `bs:c` | background-size | `cover` |
| `bs:co` | background-size | `contain` |

### Pseudo Classes

Prefix a class with a state to apply it only while that state matches.

| Class | Properties | Value |
|-------|------------|-------|
| `bs:auto` | background-size | `auto` |
| `bs:c` | background-size | `cover` |
| `bs:co` | background-size | `contain` |