Before you put a new bra on for the first time, adjust the straps to full length.
Hold your bra in front of you and lean forwards so that your breasts drop into the cups. Then fasten the underband around your body onto the loosest hook and eye.
If you have difficulty reaching the back then just fasten the bra at the front and turn it around.
Hold the base of the underwire and scoop your breasts fully into the cups.
Your nipples should be in line with the seam of the cups.
Lean forward, hold the wires under the breasts and jiggle the bra. Your breasts will fall into the cup and sit higher when you stand up straight.
The wires should be sitting on the ribcage and not the breast tissue.
Adjust the straps. Remember that the underband provides most of the support, not the straps. So they should feel firm but comfortable.
You will only need to complete this step when you put on a new bra for the first time.