Available in 3 X 5 Feet and 4 X 6 Feet Reinforced with Two Metal Grommets for Hanging High Quality, Durable Polyester The Thin Red Line. The Thin Blue Line. The Thin Gold Line. Together, these three symbols of our great firefighters, police force, and dispatchers combine to create a striking and bold flag; perfect for offering your support to all three at once. The Thin Line will always stand as strong and united as the country they protect.