What are the best image size dimensions for a course featured image?

In general the most important things about choosing a featured image size are to make sure they are wide enough and you remain consistent with the dimensions for future featured images. The featured image should be wide enough to span the widest single column view of your website. Also by choosing featured image dimensions and remaining consistent on that choice creates a clean unified design. An example course featured image dimensions that are wide enough and make for a solid consistent design is 1960 pixels wide x 1080 pixels tall.