Printful - New poster sizes are up! Square posters (12"x12", 16"x16"), as well as our smallest ever size yet (8"x10"). Check 'em all out: https://www.theprintful.com/product/posters | Facebook
What poster sizes are there? - The Printing Site
Standard Poster Sizes for Printing & Design - UPrinting.com
Standard Poster Size | Standard Poster Size in Inches
What are the Most Common Standard Poster Sizes?
Standard Poster Sizes: From Letter Size to Billboard | Renderforest
Poster dimensions and poster instructions - SLTBR
Wall Art Size Guide Standard Frame Size Guide Poster Sizes - Etsy