There are three fundamental principles of technical drawing for fashion: accuracy, instructiveness, and flatness.
- Accuracy: correctness is the key for fashion technical drawing. Inaccurate technical drawing is useless and potentially harmful. Any mistake in fashion flats translates into mistakes of product development.
- Instructiveness: technical drawing for fashion must visually communicate how depicted garment is constructed, not only how it looks.
- Flatness: technical drawings are called "flats" for a reason and the reason is that technical drawing depicts garment in its flattened condition, not the way it looks on a body.