Featured Image is showing cut off for each excerpt post on blog page

Dear Support, I am trying to determine how to have the featured image for each blog post display in full and not show as cut off on the blog page of my site where excerpts of blog posts are listed. I have tried changing the thumbnail size under Settings - Media and trying re-sizing the images, but nothing has resolved the issue. I would appreciate your providing the steps to help resolve this issue. Regards, Kelly Johnson