A **construction sheet** is the technical drawing that defines the geometry of a flag: the ratio of the field, the widths and positions of stripes, the sizes and offsets of charges, the radii of curves, and the fimbriation thicknesses. All measurements are usually expressed as fractions of the hoist, so the design can be scaled without distortion. A construction sheet often accompanies the official colour specification.
**Example**: The construction sheet for the flag of South Africa fixes the proportions of the central Y, its fimbriations and the hoist triangle to fractions of the flag’s hoist.
**See also**: [proportions](/glossary/proportions/), [geometric-construction](/glossary/geometric-construction/), [ratio](/glossary/ratio/), [pantone](/glossary/pantone/)