What is

SISTER SIZING?

Wha Is Sister Sizing

Sister sizes refer to bras that have the same cup volume but different back and cup sizes. The beauty of this method lies in how it provides flexibility. If a bra feels too tight or too loose around your bust, Sister Sizing allows you to fine-tune the fit without compromising on the volume of the cup.

Wha Is Sister Sizing
When To Use Sister Sizes

When to use

SISTER SIZES

When To Use Sister Sizes

Sister sizes are ideal if you're in between sizes, experiencing slight discomfort, or finding it hard to get the fit you love. With sister sizing, you can adjust the band and cup size while maintaining the same cup volume.

DO SISTER SIZES
REALLY WORK?

Yes, they do! If you go up a band size, simply go down a cup size, and vice versa. For example, if you usually wear a 32F, you can try a 34E or 30". Sister sizes Offer a wider fit range, allowing you to find the best possible comfort and support.

Do Sister Sizes Work

CALCULATE YOUR SISTER SIZE

Our sister size conversion chart helps you find your alternate size quickly and easily. Simply find your regular size and look at the sizes next to it — those are your sister sizes!

30A
30B32A
30C32B34A
30D32C34B36A
30E32D34C36B38A
30F32E34D36C38B40A
30FF32F34E36D38C40B42A
30G32FF34F36E38D40C42B44A
30GG32G34FF36F38E40D42C44B
30H32GG34G36FF38F40E42D44C
30HH32H34GG36G38FF40F42E44D
30J32HH34H36GG38G40FF42F44E
32J34HH36H38GG40G42FF44F
34J36HH38H40GG42G44FF
36J38HH40H42GG44G
38J40HH42H44GG
40J42HH44H
42J44HH
44J
Fit Calculator

Try the bra

FIT CALCULATOR

Fit Calculator

Our Fit Calculator is a quick and easy tool designed to help you find your perfect bra size in just a few clicks. By entering your measurements, you'll get personalised size recommendations, ensuring the best fit for ultimate comfort and support.

Find your perfect

FITTING BRA

Find your perfect fitting bra

Packed with expert advice to help you achieve the perfect fit, from how to check your underband and cup size to tips on adjusting straps for maximum support, check out our bra fit guide today.

Find your perfect fitting bra