1) The back of the band size

Keep your bra on and measure in inches around your ribcage directly under your bust

If it is an even number add 4 inches

If it is an odd number add 5 inches

This gives you the band or back size

When measuring, you should always round down!

Your underband should be snug, e.g. if you achieve 29.5 inches then round down to 29 inches

So, if your underband measurement is 29.5 inches, then you are a 34.

2) The cup size

To obtain your cup size take the full bust measurement & minus the underband = cup size

When measuring, you should always round up!

The over bust measurement should always be generous, e.g. If you achieve 34.5 inches then round up to 35 inches

34 Back size & 34 Full Bust Size = A Cup

34 Back size & 35 Full Bust Size = B Cup (1 inch difference)

34 Back size & 36 Full Bust Size = C Cup (2 inches difference)

34 Back size & 37 Full Bust Size = D Cup (3 inches difference) etc.

Please note: This information is intended to be used as a general guide only, see our advice section to find out how to obtain a correct fit.