Typically your poster will be attached to a presentation board and those come in various sizes. 2 How large is your presentation space?.It’s best to first check if there a size requirement or set of guidelines given by your the event where you are presenting. 1 Does your event require a specific size poster?.It can be challenging to change the size of your poster once it is designed so starting out with the correct size will save you a few headaches.Īnswering these questions in order will help you figure out what size to make your poster: