CAR SALES FLAGS, GARAGE FLAGS, We supply an endless selection of flags in 3’ x 4’ (915 x 1220) or 3’ x 6’ (915 x 1830) sizes, both stock designs some of which are illustrated here and bespoke designs which can quickly be made to your own design. It has been scientifically proven that most people automatically look at a flag, as the constant movement attracts their attention involuntarily.