The Women's Nike Swoosh Sports Bra utilizes a compression fit, providing medium support for a variety of training activities. Straps create stabilizing tension, helping to minimize bounce during multidirectional movement. Measure Your Band - Wrap the tape around your ribs, just under your breasts. Make sure the tape stays snug and parallel to the floor. Breathe in, out and relax. Measure to the nearest 1/2 inch or centimeter. Measure Your Cup - Start at your breastbone and pull the tape across your nipple to where your tissue ends—right under your armpit. Without squishing, keep the tape flush with your skin. Now, measure to the nearest 1/2 inch or centimetre.