Thin Blue Line Decal Full Color Vinyl Window Decal. Decal Size= 6 inches. The blue line represents those who daily protect this nation. The black background was designed as a constant reminder of our fallen brother and sister officers. Text can be added to this decal. ThinBL$6.00 Decal Size: 6 inches8 inches(+$3.50)10 inches(+$5.00)12 inches(+$8.00) Add text in blue line : NOYES(+$5.00) : SELECT THIS LINK FOR CUSTOM FIRE DEPARTMENT DECALS / STICKERS Last Updated February . 10th, 2009