[Twenty Eleven] Increasing width sidebar

For the sidebar, have you tried;

#secondary {
 width: yourWidth;
}

https://www.w3schools.com/cssref/pr_dim_width.asp

If you increase the sidebar width, you’re likely to push it down the bottom, as it will not fit aside the primary content.

To change the widget width, have you tried;

#secondary aside {
 width: yourWidth;
}

Worked like a charm, thanks!

I also use your code and it worked like a charm but it seems the sidebar has been align to the right.My question is that is it possible for me to slightly align it to the left also.
My second question is how to increase the other side of the sidebar.
Thanks in advance.

@richame
please post a live link to illustrate the problem.