Question: what are signs made of?
Answer: Acrylic Signs. Acrylic signs are made of an extremely versatile plastic sheet with a glossy finish, which is also known as Plexiglas®. ... 
Aluminum Signs. ... 
Carved Wood Signs. ... 
Coroplast Signs. ... 
Corrugated Plastic Signs. ... 
Corrugated Signs. ... 
Fabric Signs. ... 
Magnetic Signs.