WordPress Recent Posts – Loop

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Add this function in your functions.php for specific size of thumbnail

add_image_size( 'custom-size', 220, 180 );

and fetch custom-size image. For excerpt length use this function.

function wp_example_excerpt_length( $length ) {
   return 30; 
} 
add_filter( 'excerpt_length', 'wp_example_excerpt_length');