XF 2.0 width adjustment

[Bombardier]

Morning Guys & Gals

Could anybody point me in the right direction to adjust the width on a forum thread (see pic)

 

[Jordyn]

Style properties>>Messages>> and change the "Message user info block" width?

 

[forforum]

I have tried this but it doesn't change it. I noticed that the initial value of 'Message user info block width' was 120px, but on the forums, when I inspect the element it shows the width is 140px:
.message-cell.message-cell--user {
flex: 0 0 140px;
}

I'd want to change it to 200px, but I can't find a way. Can anyone help?

 

[forforum]

Update: I managed to increase it by adding this code in extra.less of the theme I am using:
.message-cell.message-cell--user {
flex: 0 0 200px;
}