Choosing the right image size for your blog can be a challenge. You don’t want a large image to take up too much space, but you also don’t want a small image that looks pixelated or small on a big screen.
To change the image size on your WordPress blog, first make sure you’ve installed the free WordPress Media Library plugin. This plugin lets you add custom media items to your blog posts and pages, including images.
To change the image size on your blog post or page, click on the gear icon in the top right corner of the post or page, and then click on Media. From here, you can select an image from your media library to use as your post or page’s background.
To change the image size for all of your posts and pages, use the Media Manager plugin. This plugin lets you manage all of your posts and pages from one place, including their images.
After installing the Media Manager plugin, navigate to Posts > All Posts to open its main screen. Under “Image Size”, you can select any of the following sizes: Small (100×50), Medium (200×100), Large (300×200), or Extra Large (500×500).