Superworms can generally be fed to any reptile/amphibian/invertebrate of any size, although tegus and large monitors may not be interested in them. The size of your pet will determine what size of superworm will be best to give to them, as the worm needs to easily fit in their mouth to be chewed and swallowed. Juvenile and small individuals will likely need small or extra small superworms. Adult and medium to large individuals are likely to do well with medium or large superworms.