Architect's scale rulers by Alvin and Fairgate. Professional-quality architects scales constructed of durable hardwood, aluminum, plastic, or bamboo core. An architect's scale is a specialized ruler used in the drafting and measuring of architectural drawings, such as floor plans. Because the scale of such drawings are often smaller than life-size, an architect's scale ruler includes multiple units of length and proportional length increments. Choose the architects drafting ruler that best fits your specific job, style, and budget. We have a architect ruler for both professionals and students.