Set WooCommerce image dimensions at the time of theme activation

Add this code to your functions.php file

/**


 * Hook in on activation


 */





/**


 * Define image sizes


 */


function yourtheme_woocommerce_image_dimensions() {


 global $pagenow;


 


 if ( ! isset( $_GET['activated'] ) || $pagenow != 'themes.php' ) {


  return;


 }





   $catalog = array(


  'width'  => '400', // px


  'height' => '400', // px


  'crop'  => 1   // true


 );





 $single = array(


  'width'  => '600', // px


  'height' => '600', // px


  'crop'  => 1   // true


 );





 $thumbnail = array(


  'width'  => '120', // px


  'height' => '120', // px


  'crop'  => 0   // false


 );





 // Image sizes


 update_option( 'shop_catalog_image_size', $catalog );   // Product category thumbs


 update_option( 'shop_single_image_size', $single );   // Single product image


 update_option( 'shop_thumbnail_image_size', $thumbnail );  // Image gallery thumbs


}





add_action( 'after_switch_theme', 'yourtheme_woocommerce_image_dimensions', 1 );