function custom_tag_cloud_widget($args) {
$args['number'] = 15; //adding a 0 will display all tags
$args['largest'] = 26; //largest tag
$args['smallest'] = 12; //smallest tag
$args['unit'] = 'px'; //tag font unit
return $args;
}
add_filter( 'widget_tag_cloud_args', 'custom_tag_cloud_widget' );

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