Extra large dildos usually work best with a lot of lube and for someone who wants to feel completely filled and consumed during use. Usually these devices are much larger than average and are based on celebrities or are just enlarged in size. Some extra large dildos are for novelty purposes only. Meaning they are so large that you probably should not actually try them and are more for display. Most of the dildos in this category are usable you should choose something that is best for you. If you order something and it's too large you can always return it no questions asked.