WordPress :: Divi Builder :: Fullwidth Portfolio Module :: Custom Thumbnail Size

child-theme-functions-php-snippet.php

<?php
/* DON'T copy the first line (above) if your functions.php already has it. 
 * ---------------------------------------------------------------------- */
 
function my_et_theme_image_sizes( $sizes ) {
	$sizes['200x200'] = 'my-et-pb-portfolio-image';
	
	return $sizes;
}
add_filter( 'et_theme_image_sizes', 'my_et_theme_image_sizes' );


function my_et_fullwidth_portfolio_thumbnail_sizes( $size ) {
	return 200;
}
add_action( 'et_pb_portfolio_image_width', 'my_et_fullwidth_portfolio_thumbnail_sizes' );
add_action( 'et_pb_portfolio_image_width', 'my_et_fullwidth_portfolio_thumbnail_sizes' );

NOTE:

You must regenerate your thumbnails after adding the above code to your child theme. The following plugin is the best tool for the job: https://wordpress.org/plugins/force-regenerate-thumbnails/