Your bra should feel comfortably snug, not binding or loose. The front center of the bra should rest on or close to the chest bone and the straps should be adjusted to support and align your breasts evenly. For optimal comfort and support, the back wings (strips of fabric which extend from the outer base of the cups and secure in the back) of your bra should rest comfortably at or below your shoulder blades.Almost 8 in 10 women are wearing the wrong size- you may be one of them. Why? Your body changes over time, and your fit will change year to year as you lose or gain weight, exercise more or less, and so on. If you are experiencing discomfort, spillage over your cups or back strap, tight straps, or a gap between your cups, you are most likely wearing the wrong size.