What is Bra Sister Size with Sister Size Charts & Table

Finding a well-fitting bra can sometimes seem like a tough task, the struggle is real - whether you're trying a new style, experimenting with something risky or just getting yourself some new bras. While knowing your correct size is essential for the perfect fit, understanding your breasts and what makes you feel comfortable is important too.

Understanding Sister Sizes is something every girl should know, because you never know when it comes handy, like - a pretty design ran out of your cup size, your current bra just doesn't sit right, or a slight variation in your cup size isn't getting you the perfect fit.

What is a Sister Size Bra?

A sister size bra refers to a bra that has the same cup volume as another bra, but with a different band size. This means that if you find your perfect bra size, but the band feels too tight or too loose, you can try a sister size to get a better fit. For example, if your regular bra size is 34C, you can try a sister size of 36B or 32D, as they both have the same cup volume but different band sizes.

You have a basic understanding of bra sizes by now, they are basically ratios - band: bust. The easiest way to understand is - as cup size goes up, the band’s width must come down to maintain the ratio of the cup size. As the band size increases around the rib cage, the cup size should decrease.

How do you Calculate your Bra Sister Size?

Now, here’s the fun part. Sister sizing takes a 32C and makes it equivalent to a 34B and a 30D too! This gives you so much more scope to explore the world of lingerie styles, sizes and more.

Sister Sizes usually run in opposite directions with one-size shifts. Confused? Don’t worry, we’re here to help.

Sizing Down: One size smaller than your current band size and one letter (A, B, C, D) larger than your current cup size. Eg: If you wear a 36C, your sister size down will be 34D.

Sizing Up: One size larger than your current band size and one letter (A, B, C, D) smaller than your current cup size. Eg: If you wear a 32C, your sister size up will be 34B.

Wondering Whether to Size Up or Down? We’ll Tell You.

Which hook do you wear your bra on?

● If your answer is “the tightest hook,” sizing down might work.

● If your answer is “the loosest hook,” then you could try sizing up!

● If your answer is “the hook in the middle” then you could try either going up or down!

You’ve got all the information you need. Now find your sister sizes in the amanté Bra Sister Size Chart below.

Amanté Bra Sister Size Chart

The chart takes away all confusion as you notice the on-size shifts in diagonal directions. As you can see in the chart above, a 32C can also be a 34B | 36C also works as a 32DD and vice versa.

Indivdiual Bra Sister Size Charts as per Band Size

32 Band Sister Size Chart

32 Band Size
Current Bra Size	Sister Size Up	Sister Size Down
32B	34A	30C
32C	34B	30D
32D	34C	30DD

 

What is 32B Sister Sizes?

If you're wearing a 32B but feel the band is a bit tight, you can try a 34A. It gives you a bit more room around the band while keeping the same cup fit. If the band feels loose, going for a 30C will snug up the band while keeping your cup size consistent.

What is 32C Sister Sizes?

If your 32C bra feels a bit too tight around the band, moving up to a 34B will give you that extra comfort while maintaining the same cup size. On the other hand, if the band feels too loose, try a 30D. You'll get a firmer fit without changing the cup size.

What is 32D Sister Sizes?

For those in a 32D who find the band too tight, a 34C might be just what you need for a more comfortable fit. If you prefer a tighter band, switching to a 30DD (30E) will keep the cup size the same while providing a more snug band.

34 Band Sister Size Chart

34 Band Size
Current Bra Size	Sister Size Up	Sister Size Down
34B	36A	32C
34C	36B	32D
34D	36C	32DD
34DD	36D	32DDD

What is 34B Sister Sizes?

If you're wearing a 34B and the band feels too snug, try a 36A. It offers a bit more room around the band while keeping the same cup size. If the band is too loose, opt for a 32C. This will give you a firmer band while maintaining the same cup fit.

What is 34C Sister Sizes?

For a 34C, if the band is too tight, a 36B will provide a more relaxed fit without changing your cup size. If the band feels too loose, going down to a 32D will offer a more secure band while keeping the cup size consistent.

What is 34D Sister Sizes?

If you're in a 34D and need more room around the band, a 36C will give you that comfort while maintaining the same cup volume. On the flip side, if the band feels too loose, a 32DD (32E) will tighten up the band while keeping the cup fit the same.

What is 34DD Sister Sizes?

For those wearing a 34DD, if the band is too tight, moving to a 36D will give you a bit more breathing space without affecting the cup size. If the band is too loose, try a 32E (32DDD) for a firmer fit with the same cup volume.

36 Band Sister Size Chart

36 Band Size
Current Bra Size	Sister Size Up	Sister Size Down
36B	38A	34C
36C	38B	34D
36D	38C	34DD
36DD	38D	34F

What is 36B Sister Sizes?

If you're wearing a 36B and the band feels too tight, you might want to try a 38A. It gives you more room around the band while keeping the same cup size. If the band feels too loose, consider switching to a 34C. This will provide a snugger band while maintaining the same cup volume.

What is 36C Sister Sizes?

For a 36C, if you find the band a bit tight, moving to a 38B can offer a more comfortable fit without altering the cup size. If the band is too loose, a 34D will give you a firmer band while keeping the cup size consistent.

What is 36D Sister Sizes?

If you're in a 36D and need more space around the band, a 38C might be the answer, as it provides a looser band with the same cup fit. If the band is too loose, try a 34DD (34E) for a more secure fit while maintaining the same cup size.

What is 36DD Sister Sizes?

For those wearing a 36DD, if the band is too tight, moving up to a 38D will give you a bit more room without changing the cup size. If the band feels too loose, a 34E (34DDD) will snug up the band while keeping the same cup volume.

38 Band Sister Size Chart

38 Band Size
Current Bra Size	Sister Size Up	Sister Size Down
38C	40B	36DD
38D	40C	36DD
38DD	40D	36F

38C Sister Sizes:

If you're wearing a 38C and the band feels too tight, consider trying a 40B. This gives you more room around the band while keeping the same cup volume. If the band feels too loose, you can opt for a 36D. This will provide a snugger band while maintaining the same cup fit.

38D Sister Sizes:

For a 38D, if the band feels too tight, moving up to a 40C will offer a more comfortable fit without changing the cup size. If the band feels too loose, a 36DD (36E) will give you a firmer band while keeping the cup size consistent.

38DD Sister Sizes:

If you're in a 38DD and need more space around the band, try a 40D for a looser fit while maintaining the same cup volume. If the band feels too loose, switching to a 36E (36DDD) will provide a snugger band with the same cup size.

40 Band Sister Size Chart

40 Band Size
Current Bra Size	Sister Size Up	Sister Size Down
40C	42B	38D
40D	42C	38DD
40DD	42D	38F
40F	42DD	38DDD

What is 40C Sister Sizes?

If you're wearing a 40C and the band feels too tight, consider trying a 42B. It offers more room around the band while keeping the same cup volume. If the band feels too loose, you might want to go for a 38D. This gives you a firmer band while keeping the cup size consistent.

What is 40D Sister Sizes?

For a 40D, if the band is a bit too tight, moving to a 42C can provide a more comfortable fit without altering the cup size. If the band is too loose, a 38DD (38E) will give you a tighter band with the same cup fit.

What is 40DD Sister Sizes?

If you're in a 40DD and need a little more space around the band, trying a 42D can be a good option, offering a looser band while keeping the cup volume the same. If the band feels too loose, switching to a 38E (38DDD) will provide a firmer band without changing the cup size.

What is 40F Sister Sizes?

For those wearing a 40F, if the band is too tight, moving up to a 42E will give you extra room while maintaining the cup size. If the band is too loose, try a 38G for a more snug fit around the band with the same cup volume.

42 Band Sister Size Chart

42 Band Size
Current Bra Size	Sister Size Up	Sister Size Down
42C	44B	40D
42D	44C	40DD
42DD	44D	40DDD
42F	44DD	40DDDD

 

What is 42C Sister Sizes?

If you're wearing a 42C and the band feels too tight, consider trying a 44B. This gives you a bit more room around the band while keeping the same cup size. If the band feels too loose, you can go for a 40D. This will provide a snugger band while maintaining the same cup volume.

What is 42D Sister Sizes?

For a 42D, if the band is too tight, moving up to a 44C can offer a more comfortable fit without altering the cup size. If the band is too loose, a 40DD (40E) will give you a firmer band while keeping the cup size consistent.

What is 42DD Sister Sizes?

If you're in a 42DD and need more space around the band, try a 44D for a looser fit without changing the cup volume. If the band feels too loose, switching to a 40E (40DDD) will provide a snugger band with the same cup size.

What is 42F Sister Sizes?

For those wearing a 42F, if the band feels too tight, consider moving up to a 44E to give you that extra room while keeping the cup size the same. If the band is too loose, a 40G will offer a firmer fit around the band with the same cup volume.

 Sister Sizes Table

Band Size	Cup Size	Sister Sizes
32 Band	32B	30C, 34A
	32C	30D, 34B
	32D	30DD/E, 34C
34 Band	34B	32C, 36A
	34C	32D, 36B
	34D	32DD/E, 36C
	34DD	32DDD/F, 36D
36 Band	36B	34C, 38A
	36C	34D, 38B
	36D	34DD/E, 38C
	36DD	34DDD/F, 38D
38 Band	38C	36D, 40B
	38D	36DD/E, 40C
	38DD	36DDD/F, 40D
40 Band	40C	38D, 42B
	40D	38DD/E, 42C
	40DD	38DDD/F, 42D
	40F	38G, 42DD/E
42 Band	42C	40D, 44B
	42D	40DD/E, 44C
	42DD	40F, 44D
	42F	40G, 44DD/E

The next time your favorite brand runs out of a pretty design or your bra just doesn't feel right, you’ll know what to do. Also, remember to keep the amanté Bra Sister Size Chart handy as the sizes follow a global standard.

That said, even though sister sizing is usually accurate, there are chances that you may find exceptions. The best option to get the best fitting bra is to find your perfect fit.

FAQs

Do bra sister sizes work?

Yes, sister sizes often work. You can go up or down one size, to find your perfect fit.