Measure under your bust where the bottom of your bra sits on your ribs, making sure the tape measure sits flat all the way around. Make a note of the measurement in inches/cm. Round this measurement to its nearest 5cm for your underband measurement.
Step 2
Measure your overbust
Measure across your bust at the fullest part, making sure the tape measure sits flat all the way around. This measurement should be in inches.
Step 3
Calculate your size
To calculate your bra size, subtract your Step 1 underbust measurement in inches from your Step 2 overbust measurement.
Please use the chart below to work out your cup size.