A Bra that Fits
There is a more compelling reason to keep your band snug. Think of your upper body as a teeter-totter, with your breasts on one end and your bra back on the other. Your body is the fulcrum in the middle. As the bra back slides up in the back, the breasts will come down (sag) as shown in the picture here. Sagging breasts are most often the result of a loose band, but it can also be caused by a fabric used in the cups that is far too stretchy to be supportive. As you will learn, the fabric choices for bra-making are of the utmost importance. Some bra styles seem to expose a lot of breast tissue at the side near the underarm as shown in the drawing below. This style of bra with very narrow bands is meant to be worn by those who don’t need the support of a bra. Most women need a band that is wide enough and of fabric with enough strength to give real support to the breasts.
Underwires that poke the breast tissue or your arm as you move it forward, are definitely too small. If the underwire is poking you in the armpit, it may be a sign that the diameter of the wire is too big, or the underwire itself is too long. If the underwire at the center front does not lie flat, but comes out at an angle from your body, or curves, or is anything but vertical along the chest wall at center front, it’s not right. The cup depth or the bridge will need to be altered in order for the bra to lay flat against the center of your chest. In short, a bra that fits should have enough cup room and support to be comfortable and effective without digging, sagging, poking or bulging anywhere.