1. Look in the mirror
-Kate Horrell, fitting expert for www.figleaves.com, recommends you stand in front of a mirror, looking out for pinching, pulling and sagging – tell-tale signs you have the wrong size bra.
2 .Watch for spillage
-If your breasts are spilling out, you might need to try a bra with a smaller back and a larger cup size.
3 .Check your wire positioning
-Bend forward and make sure the wires are under the bust.
-Stand and move the breast from the underarm, if necessary, so it’s inside the wire.
-Part your bust to make sure the centre of the bra sits between the breasts.
4. If your bra is riding up at the back
You need a smaller back size. Corsetry experts Rigby & Peller say the back band should be level with the underwire.
-The band must support the breasts’ weight in the mid to lower back.
-If it’s too loose, the shoulders will carry the weight, leading to back problems.
5. Look for any signs of ‘digging in’
-If your bra is leaving red marks or digging at the arm pits, you may need a bigger cup.
-If your shoulders are sore, get a bra with padded or wider straps.
6 .Consider the time of the month
-Most women’s breasts fluctuate depending on the time of the month.
-Buy a bra with lots of stretch in it.
7. If your bust sags
-Shorten straps or choose a more supportive style with a less stretchy fabric.
8. Recheck your size
-Marks & Spencer’s Paschal Little recommends you get fitted every six months as the shape and size of breasts changes constantly.