A lot of people use the tag cloud widget in WordPress to show their post tags on their widgetized sidebar but you can also manually add a tag cloud to your theme which is perfect for creating a custom tag cloud page template or for adding them to your theme in areas that you don’t necessarily want widgetized. This code snippet will show you how to display a custom tag cloud anywhere on your site via your theme files and style them to look clean and modern.
'smallest' => 10, // size of least used tag
'largest' => 18, // size of most used tag
'unit' => 'px', // unit for sizing
'orderby' => 'name', // alphabetical
'order' => 'ASC', // starting at A
'exclude' => 6 // ID of tag to exclude from list