The bricks theme comes without any usable image sizes for your design needs. Feel free to copy this cheat sheet to your Bricks child theme’s functions.php
to get usable image sizes in 1:1, 16:9, 3:2, 4:3, 3:4, 2:3 and the original aspect ratio of the image.
Make sure to always choose the resolution that most closely matches the maximum size that the image will be displayed at. All other smaller resolutions with the same aspect ratio will be automatically set in the srcset for smaller devices / resolutions (but it will max out at the one you set).
If you already have images uploaded, you will have to re-generate them using https://de.wordpress.org/plugins/regenerate-thumbnails/ 3
/**
* Custom Image Sizes
*/