With flyers and poster it's good practice not to view them in isolation. Flyers are often displayed alongside other flyers so they need to fight for attention. Knowing in advance the end placement for flyers and posters helps when getting the design right.
As a service, I can offer guidance on the best formats for your target audience. From concept to completion, ideas and pre-visuals are shown at every stage of the process to ensure the end product is the perfect reflection of initial design brief. Reference sheets and colours guides are provided to make any new promotional material consistent and have impact.
I can also help with ideas generation if you're not quite sure what you need and want guidance.