Sister sizing

Cup size perfect, band not fitting quite right?
Need help finding your one piece size?

You might need to try your sister size!

What is sister sizing?

All bra sizes have a set of “sister sizes”. These are alternate sizes where the cup volume stays the same even though the band and cup sizes change.

Sister sizes can be used when your top fits perfectly in the cups, but is too tight/loose in the band, or to find your fit in our one pieces if you wear a different top and bottom size.

Your sister size can be determined by a set of one-size shifts in opposite directions. When you size up in the band you size down in the cup and when you size down in the band you size up in the cup.

For example, a size 32DD could also wear a size 30E or 34D.

Let us explain...

How to find your sister size

Cups fitting perfectly, but the band is too tight/loose? You will need to sister size to find your fit!

When you size up in the band you size down in the cup and when you size down in the band you size up in the cup.

Here are some examples on how to get the fit
just right in our swim tops, if you need to try another
band size but maintain the same cup size.

Band too loose

Cups fit in size 34DD, band too loose

Band size smaller: ↓ band ↑ cup
E.g. Band size 32 (10AU/6US) and
bra size 34DD should take a 32E

This will be one size down in the band,
while maintaining the same cup
capacity as your usual 34DD!

Band too tight

Cups fit in size 34DD, band too tight

Dress/band size bigger: ↑ band ↓ cup
E.g. Dress/band size 36 (14AU/10US) and
bra size 34DD should take a 36D

This will be one size up in the band,
while maintaining the same cup
capacity as your usual 34DD!

How to fit our one pieces

Our one pieces are best fitted to the body first and then adjusted according to your bra size.

So, if your dress size is bigger or smaller than your bra
band size you will need to sister size.

Here are some examples on how to find your fit in our one pieces if your dress/body size is different to your bra size.

Smaller bottom

Bra size 36D, dress size 12AU

Dress/band size smaller: ↓ band ↑ cup
E.g. Dress/band size 34 (12AU/8US) and
bra size 36D should take a 34DD

This will be one size down in the band,
while maintaining the same cup
capacity as your usual 36D!

Larger bottom

Bra size 34DD, dress size 14AU

Dress/band size bigger: ↑ band ↓ cup
E.g. Dress/band size 36 (14AU/10US) and
bra size 34DD should take a 36D

This will be one size up in the body,
while maintaining the same cup
capacity as your usual 34DD!

Still unsure of your size?

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