E-Cigarettes Prohibited Sign | 6 x 6 | White/Blue E-Cigarettes Prohibited Sign | 6 x 6 | White/Blue. E-Cigarettes Prohibited Sign is perfect for restaurants and businesses. Sign is made from 100% american made engraved plastic. E-Cigarettes Prohibited sign comes in White plastic with Blue letters, other colors are available. Please contact us for more information. Order today. Ships tomorrow.