Firstly, you need to measure your band size. If you have larger breasts, you should opt for wearing a non padded bra. Otherwise, you can go braless.
With a tape measure, parallel to the floor, wrap the tape around your back tightly and measure right under your bust. This will give you your band size (cm).
Then, you will need to measure your bust. You will need to measure around the fullest part of your breasts, usually across the nipples once again parallel to the floor. This should be slightly loose
. Next will be your cup size (cm). You can use our charts for this