Which phrase must appear on a rough sketch?

• A. The phrase 'scale 1:100'
• B. The phrase 'not for scale'
• C. The phrase 'scale 1:500'
• D. The phrase 'not to scale'

Answer: (D)

Rough sketches are informal drawings that show layout without preserving exact proportions. To prevent readers from treating the sketch as measured, a note indicating the drawing isn’t meant to be scaled is essential. The phrase "not to scale" communicates clearly that dimensions and distances should not be inferred from the drawing, which is exactly the intent of a rough sketch. Other options either imply a specific scale or use nonstandard wording, which could mislead or confuse. For these reasons, the standard phrase to include is "not to scale."