City Lips lip plumper is a lip plumping treatment that can visibly increase lip size safely and painlessly by enhancing collagen and lip plumping factors with each application. City Lips technology reduces lip wrinkles and fine lines. makes your lips incredibly soft. hydrated. visibly fuller and more youthful. without the burning associated with some lip plumpers. \'City Lips. ..plumped people's lips an average of 3 millimetres' K. Rauen - Good Housekeeping Institute. USA