How to change default image size?

WordPress creates this kind of image size by default:

  • Thumbnail;
  • Medium;
  • Medium Large;
  • Large.

The default image sizes are as follows:

  • 150px square for thumbnails;
  • 300px width for medium images;
  • 768px max width for medium_large images;
  • 1024px max width for large images.

If you want to change default image sizes in the WordPress Dasboard find Media->Settings. An image below.

Important!!! If you change default WordPress image size, you need to reupload your images.