Unconvenient, in fact, the size of the breast is not static. Therefore, a measurement of the upper and lower Wai data does not serve as the eternal and the only standard to buy underwear . Best to develop the habit of observing your body at any time, and measure the bust every 3 months. Avoid using a bra size for many years, this is abusing her own breast Oh! You need to prepare: a soft ruler, a mirror. Please be in the process of measuring, remain naked, facing the mirror. Measuring the circumference: upper body upright, breathing to maintain the natural, tape measure the bottom of the breast, can not be too high nor too low, the level of one week around. Must pay attention to maintain the level of the back of the tape do not fall. The measured centimeter is the size of the next Wai. Measure on the circumference: upper body bent over 45 °, breathing to maintain the natural. To nipple as the measuring point, soft-foot around a week, you can give a little nipple, do not let the tape pressed against the nipple. The measured centimeter is the size of the circumference. Perimeter: Use the Wai minus the next Wai, the value obtained is the margin. Calculate the size: Use the size on the Wai minus the size under the sieve to get the cup size, is the most common method of calculating the bra size. However, this calculation can only get a basic size, need to take into account the various breasts, make the appropriate adjustments in order to come up with the basic bra size to meet the needs of the body. This size is the most basic, and then also be adjusted according to the bias between different brands. Core Spun Yarn,Spandex Core Spun Yarn,Core Spun Spandex Yarn,Core Spun Polyester Spandex Yarn Ningbo Grantex Textile Co., Ltd , https://www.grantexindustries.com