Here are some of the most common tell-tale signs that you need a new bra.

1. The band around your body should be firm but comfortable. When you stand side-on at a mirror, the strap that runs around your body should be horizontal and should not ride up at the back at all.
2. The wires at the front should lie flat against your rib cage and should not dig in, rub or poke out at the front.
3. Your breasts should be enclosed in the cups and you should have a smooth line where the fabric at the top of the cup ends and meets your bust. You shouldn't have any ridges or bulging over the top or sides of the cups, even if you are wearing a balconette or lower cut style.