These car coasters are come in a set of (2), and are approximately 2.56" in diameter.  There is a convenient notch on the side of the car coaster for easy removal for cleaning.  
 
These Neoprene Car Coasters can easily absorb the liquid outside the cup, keeping your car cup holder dry and clean.  These car coasters can wash easily in water, then brush to clean.  Air Dry.  
 
The design is permanent, so no need to worry about fading.
Personalized coasters also have a permanent design, and are NOT vinyl.