Featured Image as Thumbnail on Front Page Left to Post Excerpt

Hi Moderator, I want to show featured Image on left side of post excerpt as a thumbnail (250px L*W) on Blog Front Page, not the default full size of 750px. Like this page.

I read a post in which aigars mentioned the way but could not understand it properly. can you clarify it in a better way? The link is Here.

Hello there,

I hope you are doing well today.

The image size is at default set to 230px LxW however you can use the following CSS code to change the image size by going to Appearance > Customize > Additional CSS and pasting it there.

/*Edit featured image size*/
figure.post-featured-image img {
    width: 150px;

In the post created by Aigers, he was referring to the page attributes, you can access it by editing a page then go to the right hand side to Page Attributes > Templates and you would select the template from the drop down menu.

Best Regards,