A pylon sign is a freestanding sign that is over 8ft tall and typically detached from a building. They are also called pole signs or freestanding signs. It is an outdoor sign design that is frequently mounted on one or two poles. They can be single or double sided. They’re usually lighted and often installed on a business property. Pylon signs are illuminated cabinets mounted on welded, staged poles from 20 feet to 80 feet or taller.