What is the proper image size to use?

Hi -

I’ve followed the guidance here. I’ve used a 1920 x 550 image for the featured image for my posts.

This works wonderfully when displaying the posts in the carousel on the Homepage, BUT when I load the actual post, the featured image at the top of the page is cut off and only covering half of the width of the page.

Am I doing something wrong?

Hey there

I need a link to your single post, please provide it here