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Step One
Take your Measurements
Two measurements need to be taken. The rib cage circumference (measurement A) and the bust circumference (measurement B). Both measurements need to be recorded in inches.
The measuring tape should sit firmly, but not tightly against your skin. You should be breathing out when taking the measurements. When measuring, we recommend wearing your best fitted everyday bra.
Step Two
Determine your Band Size
Measurement A will determine the band size.
28” = size 6 38" = size 16
30” = size 8 40" = size 18
32” = size 10 42" = size 20
34” = size 12 44" = size 22
36” = size 14 46" = size 24
Step Three
Determine your Cup Size
Determine your cup size by doing a simple calculation to measure the difference between the ribcage size and the bust size.
Measurement B (in inches) – Measurement A (in inches) = a difference of ??
Eg Measurement B = 40", Measurement A = 36” = difference of 4” = D cup
Difference of 1" = A cup
Difference of 2" = B cup
Difference of 3" = C cup
Difference of 4" = D cup
Difference of 5" = DD cup
Difference of 6" = E cup
Difference of 7" = F cup
Difference of 8" = FF cup
Difference of 9" = G cup
Difference of 10" = GG cup
Difference of 11" = H cup
Difference of 12" = HH cup
Difference of 13" = J cup
Difference of 14" = JJ cup
Difference of 15" = K cup
Step Four
Put It All Together
If Measurement A is 32”, then the ribcage size should be a 10.
If Measurement B is 36”, then the difference between Measurement A and B is 4 inches, which will mean a cup size D. This example is a 10D.
Another example. If Measurement A is 38”, then the ribcage size should be a 16. If Measurement B is 45”, then the difference between Measurement A and B is 7 inches, which will mean a cup size F. This example is a 16F.
Step Five
Time to Troubleshoot!
You may not notice some inaccuracies in your measurements. But don't worry, this is not uncommon. The tape measurement system generally works well as a good guide.
If your size is not aligning with your expectations, reach out to us with some details about your measurements - we'd love to help!
Watch our tutorial video on how to measure your bra size
