Floor plan drawings are usually drawn at a scale of 1⁄4 inch equals 1 foot to represent the actual size of a building structure on paper. Standard architectural scales include ratios such as 1/8 inch to 1 foot, 1⁄4 inch to 1 foot, and 1/2 inch to 1 foot, with different scales used for specific types of drawings like plot plans, floor plans, and construction plans. Architect's scales are triangular rulers marked with various scale ratios, including metrics and imperial, to allow measurements from scaled drawings.