Reply To: Featured Image: Too Big on Blog Page!

There are a few different things you could try;

1. upload smaller images

2. set a maximum width for the featured image on single posts with this code added to ‘Customize’ > ‘Additional CSS’

.single-post .post-thumbnail {
    maximum-width: 300px;
}

3. hide the featured image from view with the following Additional CSS, and then add an image to the post’s main content at any place you like within the post’s text.

.single-post .post-thumbnail {
    display: none;
}