Start with final dimensions
Yale’s poster guidance recommends building at final size or the closest proportional size. A point-size recommendation assumes a document scale: enlarging a half-size layout changes the physical lettering at output. Record both working dimensions and intended printed dimensions.
Choose a hierarchy from a stated example
Yale recommends at least 24-point ordinary text, 48-point headings and 72-point titles as a starting example, with larger sizes where needed. Its half-size example uses half those values. These are its poster recommendations rather than universal minimums for every sign or viewing situation.
Give essential detail enough room
Keep the main finding or event title prominent, but leave body copy, dates and figure labels readable. Shorten a crowded paragraph before reducing everything to fit. A heading family from the poster collection still needs an appropriate scale and companion treatment.
Keep a reproducible output record
Save the intended page size, heading and body sizes, selected families and export route with the project. A layout prepared for a printed board and a social thumbnail need separate decisions. Use the point-size guide for measurement background and PDF embedding for font-resource delivery.
Your questions, answered.
Are 24-point and 72-point values universal poster rules?
No. The cited Yale guide gives starting recommendations that depend on the font and output scale.
Why does working at half size matter?
The final enlargement changes physical text size, so the working document and output dimensions must be considered together.
Sources & background
Sources supporting this page’s explanations. Practical examples are our editorial suggestions.