When choosing the size of your outdoor sign, you should consider how much space you have to work with and what your goals are for the sign. If you're looking for signage or a logo that will simply provide visibility for your business, then a smaller, simpler sign may be all you need to garner interest and bring in foot traffic. If you're looking to use your outdoor sign as a marketing tool to advertise a sale or special, then you'll need a sign that is larger and more prominently displayed.