Full Width Blog Post

You can make individual posts full with without sidebar by targeting them using CSS based on their ID. Here is an example:

.postid-1241 .main-content-inner.col-md-8 {
  width: 100%;
}
.postid-1241 .single-featured {
  width: 100%;
}
.postid-1241 #secondary {
  display: none;
}

This example won’t work for your website and you need to inspect your website source to find the right ID.