There are a few layout choices you can choose from the theme.

  1. On “Blog” page navigate to [SITE NAME] – Customize link on admin toolbar
  2. Go to Bluchic Theme – Blog page settings tab
  3. Check all necessary settings for your preference
  4. Click Publish on top to publish your changes (Note: Make sure it’s not Draft or Schedule)

Make sure to regenerate your thumbnail after you setup the Featured Image size.

Below is the settings of demo site for your reference:

Divi ChicServe Blog page settings