<https://wordpress.org/plugins/simple-local-avatars/>

// To show a full size user Avatar
// Props
https://wordpress.org/support/topic/possible-to-show-larger-image/
add_filter( 'pre_get_avatar_data', function( $args ) {
$args['size'] = 'full';
return $args;
}, 5 );
Code language: PHP (php)