To use this headband, simply place it around your head. It's one - size - fits - all, so it should be comfortable for most people. For Halloween, pair it with a cool costume to really stand out. When it comes to maintenance, keep it away from sharp objects to avoid tearing the satin or knocking off the rhinestones. You can gently dust it with a soft cloth to keep it looking shiny. Just remember, because of hygiene reasons, this item can't be returned.