This is a blue line flag 65mm car coaster that can be modified to be blue line, red line, gray line, yellow line, green line etc etc. All you have to do is change the blue line to whatever color you want. It is double sided so if one side gets messed up in printing or by use, you can use the other side. It is 65mm in diameter which is the most common size of car coaster. You should measure the base of your car cup holders before making this and double check the size. In one of my vehicles I had to increase the size to 77mm. In my other vehicle it was just right at 65mm so please check before printing.