For women, a size 6 waist is equivalent to 26 inches. This size also corresponds to a bust size of 34 inches and hip size of 36 inches. Waist size is determined by measuring the narrowest part of the waist.
With children, the equivalent in inches of a size 6 waist is different for girls and boys. For girls, a size 6 corresponds to a waist size of 22 inches, while for boys, the value is 23 inches. When measuring the waist size of people who have less curvy body shapes, bending to the side helps to find the body's natural indent.