Poster Design GuidePosters are seen from a distance. Every design decision must account for readability at 5–15 feet away.Key PrinciplesBold, simple imagery — One dominant visual elementLarge typography — Title readable from across a roomHigh contrast — Must stand out on a wall or displayClear hierarchy — Most important info firstStrategic white space — Don't fill every inchStandard SizesA3: 297×420mm (small poster)A2: 420×594mm (standard poster)A1: 594×841mm (large poster)24×36 inches: Common US sizeFor PrintResolution: 300 DPI minimumColor mode: CMYKBleed: 3mm on all sidesFile format: PDF/XFor DigitalResolution: 150 DPI sufficientColor mode: RGBFormat: PNG or JPEGDesign your poster with AI →