Sister sizes bra: why are they important?

Zustermaten bh, waarom zijn ze belangrijk?
SYST - Author - Monique van Beek

Monique van Beek
Lingerie en Badmode expert

Ik ben al bijna 20 jaar trotse eigenaar van ons familiebedrijf Dutch Designers Outlet waarbij we met betaalbare lingerie jouw persoonlijke garderobe verrijken. Ik heb grote ambities en grote dromen, en soms komen deze gelukkig ook nog uit.

Ik draag het liefste sneakers, Ook onder een feestjurk. Niet omdat ik hoge hakken niet mooi vind, maar omdat het zo moeilijk danst en ik graag door het leven huppel en dans.

Helemaal mezelf zijn en een vrouw een goed en positief gevoel bezorgen door haar de juiste en goed passende lingerie te laten ervaren bezorgt mij het ultieme gevoel van YES!

Verrijken kun je breed zien; in modellen, kleuren en kwaliteit. Dit omdat we nauw contact hebben met onze leveranciers zoals Marlies Dekkers, LingaDore en After Eden. Maar ook in verrijking van comfort. Kom je er niet uit, help ik je graag persoonlijk op weg via de telefoon of mail. Ik spar graag met je wanneer je er niet uitkomt bij het uitzoeken van jouw maat of model bh of badmode.


FAQ

Is 80C the same as 75D?

Yes, 80C and 75D are sister sizes. Both sizes have the same cup volume, but 75D has a tighter band size than 80C.

Is 80D the same as 75E?

Yes, 80D and 75E are sister sizes with the same cup volume, but a different band size. 75E has a tighter band than 80D.

Is 80E the same as 75F?

Yes, 80E and 75F are sister sizes. The cup content is the same, but 75F has a tighter band size. Sister sizes keep the same cup content while the band size changes.

Do I have cup B or C?

Whether you have a cup B or C depends on the size of your bust circumference in relation to your band size. By measuring your bust width (the widest part of your bust) and your underbust width, you can determine your cup size. A difference of about 12-14 cm between your under bust and bust often equates to cup B, while 14-16 cm often corresponds to cup C.

What is the sister size of 85B?

The sister size of 85B is 80C: one band size up and one cup size down. The other sister size is 90A: one band size down and one cup size up. Sister sizes offer the same cup content with a different band size.

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sep 5, 2024

Good day fine reader, nice to welcome you here to a new college of Dutch Designers Outlet her Lingerie and Swimwear expert. In this blog I will explain to you why sister sizes are important. After all, many women don't know that there are sister options besides their standard bra size. Imagine your bra fits perfectly, but the band pinches or is just too loose. This is where the sister size bra comes into the picture. They give you the freedom to try a different band size without changing the cup size. Rest assured; this is not at the expense of fit or comfort.

Common bra problems solved by sister sizes

Every woman knows the feeling of shoulder straps cutting into your skin or a band creeping up as if it wants to go on vacation. These are often signs that you are not wearing the right bra size. A sister size bra can also come in handy if you find a bra in our shop that is no longer available in your standard size. Thanks to the sister size you can still grab that bargain in our Lingerie Sale. More importantly, you can finally say goodbye to annoying red marks on your shoulders and torture with a band that is too tight.

Bra size measurement

Before you can switch to sister sizes, you obviously need to know what your basic bra size is. Have no idea where to start? Don't panic, I have a step-by-step guide for you in my blog"The importance of calculating the right bra size. Take a tape measure, a mirror and some quiet time to find out what size really fits you. Once you know that, converting to sister sizes is child's play!

Bra size explained

Your bra size consists of two elements: the band size and the cup size. Both sizes are measured by the circumference of your body, so we speak of an upper and lower measurement. The band size is the number that indicates how tight or loose the band is around your body. It is the circumference of your body in centimeters. The cup size is indicated by a letter and is the ratio between the two measurements. The larger the difference, the larger the bra cup size. It may sound difficult, but with the bra size chart we have determined your ideal bra size in no time. Determining bra size has never been easier with that table!

Bra size calculation with or without bra

You may be wondering: should I measure my bra size with or without a bra? Simply put: both can be done. By wearing a properly fitting bra, your breasts get support, are in the right place and in the right shape. Wear an unlined bra for the most accurate measurement. After all, you don't want a padded bra to affect the numbers. Keep it simple: wear a bra with no padding for the best results!

How do you find your sister size bra?

Finding the sister size of your bra is easy. Still, bra size conversion needs some explanation. When the band is too tight, you go up one size in the band and down one size in the cup. On the other hand, is the band too loose? Then of course you reverse it by going one size down in the band and one size up in the cup. As an example, for an 80C, the sister sizes are 75D and 85B. It's like simple arithmetic that, almost magical. But really, it's just clever lingerie science that helps you always find a bra that fits right. Here's a little table as an example.

Sister Your Size Sister
65D 70C 75B
70D 75C 80B
75D 80C 85B
80D 85C 90B

I make it even easier for you with my sister size calculator tool. Select your circumference and cup size from your base size, press the button and the tool does the rest!

 

How do you know if you have the right sister size bra?

So, you've found and tried on your sister sizes, but how do you know if it's really the right size? The bra should be comfortable without the band creeping up. The cups should not gape or bulge. Finally, you should also be able to breathe without the bra feeling like you're in a corset. If everything is right, then you are the proud owner of the right sister size bra!

Sister sizes bra and different bra styles

Not every bra style responds the same to the sister size formula. For example, a balconette bra may fit sister sizes differently than a t-shirt bra or push up bra. With a plunge bra, the volume of the cup content may be the same, but the fit is still different because of the low cut. Be sure to try on different styles to see how your sister size bra compares to your preferred style. Maybe a good time to try a different bra style and spice up your lingerie collection! I have a blog you might find interesting in which I explain all kinds of bras:'What types of bras are there?'

The 4 commandments for measuring your bra sizes correctly

To find the perfect bra, you need to know the correct measurements. Even the smallest error can lead to an incorrect fit and therefore uncomfortable lingerie. Fortunately, you can easily order multiple sizes and styles in our online store to try on and try on at home. Whether you are looking for an underwire bra, a beautiful lace one or a bra in a playful color. You have plenty of choice in our collection and all the more reason to experiment with different types of lingerie to discover which style suits you best.

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SYST - Author - Monique van Beek

Monique van Beek
Lingerie en Badmode expert

Ik ben al bijna 20 jaar trotse eigenaar van ons familiebedrijf Dutch Designers Outlet waarbij we met betaalbare lingerie jouw persoonlijke garderobe verrijken. Ik heb grote ambities en grote dromen, en soms komen deze gelukkig ook nog uit.

Ik draag het liefste sneakers, Ook onder een feestjurk. Niet omdat ik hoge hakken niet mooi vind, maar omdat het zo moeilijk danst en ik graag door het leven huppel en dans.

Helemaal mezelf zijn en een vrouw een goed en positief gevoel bezorgen door haar de juiste en goed passende lingerie te laten ervaren bezorgt mij het ultieme gevoel van YES!

Verrijken kun je breed zien; in modellen, kleuren en kwaliteit. Dit omdat we nauw contact hebben met onze leveranciers zoals Marlies Dekkers, LingaDore en After Eden. Maar ook in verrijking van comfort. Kom je er niet uit, help ik je graag persoonlijk op weg via de telefoon of mail. Ik spar graag met je wanneer je er niet uitkomt bij het uitzoeken van jouw maat of model bh of badmode.


FAQ

Is 80C the same as 75D?

Yes, 80C and 75D are sister sizes. Both sizes have the same cup volume, but 75D has a tighter band size than 80C.

Is 80D the same as 75E?

Yes, 80D and 75E are sister sizes with the same cup volume, but a different band size. 75E has a tighter band than 80D.

Is 80E the same as 75F?

Yes, 80E and 75F are sister sizes. The cup content is the same, but 75F has a tighter band size. Sister sizes keep the same cup content while the band size changes.

Do I have cup B or C?

Whether you have a cup B or C depends on the size of your bust circumference in relation to your band size. By measuring your bust width (the widest part of your bust) and your underbust width, you can determine your cup size. A difference of about 12-14 cm between your under bust and bust often equates to cup B, while 14-16 cm often corresponds to cup C.

What is the sister size of 85B?

The sister size of 85B is 80C: one band size up and one cup size down. The other sister size is 90A: one band size down and one cup size up. Sister sizes offer the same cup content with a different band size.

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