Waist–hip ratio
WHR is used as a measurement of obesity, which in turn is a possible indicator of other more serious health conditions. The WHO states that abdominal obesity is defined as a waist-hip ratio above 0.90 for males and above 0.85 for females, or a body mass index (BMI) above 30.0. The National Institute of Diabetes, Digestive and Kidney Diseases (NIDDK) states that women with waist-hip ratios of more than 0.8, and men with more than 1.0, are at increased health risk because of their fat distribution.
T-shirt
A T-shirt typically extends to the waist. Variants of the T-shirt, such as the V-neck, have been developed. Hip hop fashion calls for "tall-T" shirts which may extend down to the knees. A similar item is the T-shirt dress or T-dress, a dress-length T-shirt that can be worn without pants. Long T-shirts are also sometimes worn by women as nightgowns. A 1990s trend in women's clothing involved tight-fitting "cropped" T-shirt or crop tops short enough to reveal the midriff. Another less popular trend is wearing a short-sleeved T-shirt of a contrasting color over a long-sleeved T-shirt, which is known as "layering". T-shirts that are tight to the body are called "fitted", "tailored" or "baby doll" T-shirts.