Width of the blog

Hi there,
Can you provide a URL so I can have a closer look?

You will need to add this

@media(min-width:700px) {
    .container {
        width: 90%;
    }
}

in your custom CSS box under Appearance ? Customize ? Additional to change the margins but this means you will need to change all images default dimensions to larger ones.
So open functions.php and change

   set_post_thumbnail_size( 665, 435, true );
   add_image_size( 'ci_slider', 1110, 600, true );

image sizes to new larger ones.
Then install the Regenerate thumbnails plugin, activate it and go to Tools -> Regen. Thumbnails to run a regeneration in order for the change to be applied.

Thanks a lot it worked ?
The best theme and Support Oslentheme

Glad I could help ??

Hi I have tried this however my feature image is still not being resized after all the steps.Can you please tell what I am missing .Here is a link to my blog https://themirroraddiction.com/

Hi there,
From you new threads I can tell you managed to resolve this.
If you have any follow ups please continue in your new thread.