The golden ratio is an aesthetic ratio that looks best on someone. This ratio is very essential in all types of cosmetic/aesthetic procedures, and it is very important in a hair transplant because it means identifying the most natural hairline for the patient. When this ratio is specified, the distance between the chin and the tip of the nose, the tip of the nose, from the one of end of one eyebrow to the other, and the hairline are measured. We prefer that these ratios are close to each other. On average, the distance between the eyebrows and the hairline is 6 – 7 cm. However, there is an important point here. If the patient is in old age, it is best to revise the golden ratio in accordance with their age.