Blueprints and house plans will come in several standard sizes. Two of the most common architectural drawing sizes are 18” x 24” and 24” x 36”, but you can also find them in 30” x 42” and 36” x “48” sizes. Large sizes are necessary on bigger and more expensive properties. But regardless of the blueprint paper size being used, its purpose is to show a trained person how to build that particular home. Feel free to look at all of the drawing paper sizes we have at Engineering Supply. We’re sure you’ll be able to find something that will meet your specific needs.