In 2010, the average neck circumference for women, per Good Housekeeping, was 13.5 inches. Just below the Adam’s apple, the circumference of the neck can be measured by tightly wrapping a tape measure around the neck.
Many heart disease investigations have focused on waist circumference. There is evidence, however, that the neck circumference is also an indicator of heart disease risk. Researchers from the Framingham Heart Study found in a 2009 study of 3,320 people that neck fat may be connected with high cholesterol and diabetes. These can cause cardiovascular disease. The risk of heart disease increases if a man’s neck circumference is larger than 16 inches and a woman’s neck circumference is greater than 13 inches, according to the study.