|    Style    | Weight |
|-------------|--------|
| Hairline    |      1 |
| Thin        |    100 |
| Extra Light |    200 |
| Light       |    300 |
| Semi-Light  |    350 |
| Regular     |    400 |
| News        |    450 |
| Medium      |    500 |
| Semi-Bold   |    600 |
| Bold        |    700 |
| Extra Bold  |    800 |
| Heavy       |    850 |
| Black       |    900 |
| Extra Black |    950 |

There are many lists on the Internet. I'm fine with this one from [FontLab](https://www.fontlab.com/).