| Screen size | Abbreviation |
| Mobile portrait | xs |
|
0-478 375 primary mobile design size |
|
| Mobile landscape | sm |
| 479-767 | |
| Tablet | md |
|
768-991 768 primary tablet design size |
|
| Desktop | |
| 992-1280 | lg |
|
1281-1920 1920 primary desktop design size |
xl |