Which feature is typically included on engineering drawings to convey size?

• A. Annotations
• B. Color Coding
• C. Dimensions
• D. Textures

Answer: (C)

Dimensions convey size on engineering drawings. They are the numeric values that specify how big features are or how far apart they must be, shown with dimension lines, extension lines, and arrowheads, and include units and tolerances. This is how a part’s length, width, diameter, or depth is precisely defined so a manufacturer can reproduce it. Annotations are notes for additional information, color coding helps classify or differentiate items, and textures indicate surface finish or material properties — none of these specify exact size. For example, a hole noted as 12.00 mm in diameter with a tolerance of ±0.05 mm tells you the exact size range the hole must fall within.