A sister size to 36DD is a different band-and-cup combination that holds the same amount of fabric, creating a similar fit. For example, 34DDD and 38D are sister sizes to 36DD.
Bra sizes are calculated using two measurements: the band size (around your ribcage) and the cup size (the difference between your bust and band measurements). However, these measurements aren't always precise, leading to fit issues. Sister sizes help address this by offering alternative sizes that maintain the same cup volume but adjust the band and cup letters.
Each sister size changes the band by one inch and the cup by one letter. Moving up a band size (e.g., 36 to 38) requires a smaller cup letter (e.g., D to C), while moving down a band size (e.g., 36 to 34) requires a larger cup letter (e.g., D to DDD). This keeps the cup volume consistent.
For instance, if you normally wear a 36DD but find it uncomfortable, trying a 34DDD or a 38D might provide a better fit. Many women find that sister sizes offer more comfort and support than their original size.
Sister sizes come in three variations based on the original size:
| Original Size | Smaller Band | Larger Band |
|---|---|---|
| 36DD | 34DDD | 38D |
| 34C | 32D | 36B |
| 38D | 36DDD | 40C |
Finding the right bra size is important for comfort and support. Ill-fitting bras can cause discomfort, poor posture, and even health issues like back pain. Sister sizes provide a solution when the standard size doesn't fit well. Many women discover that sister sizes offer a better fit than their original size.
According to a study by Journal of Physical Therapy Science, 80% of women wear the wrong bra size, highlighting the importance of finding the right fit. Sister sizes are a simple way to explore alternative sizes that might work better.
Many people believe that sister sizes are just smaller or larger versions of the original size. However, sister sizes maintain the same cup volume by adjusting both the band and cup letter. For example, a 34DDD has the same cup volume as a 36DD but with a smaller band and larger cup letter.
Another misconception is that sister sizes are only for specific body types. In reality, sister sizes can benefit anyone looking for a better-fitting bra. They are particularly useful for women with larger busts or those who struggle with standard sizing.
To find your sister sizes, start by measuring your band and bust. Use a measuring tape to measure around your ribcage (band) and the fullest part of your bust. The difference between these measurements determines your cup size.
Once you have your measurements, use a sister size chart to find equivalent sizes. For example, if you wear a 36DD, your sister sizes would be 34DDD and 38D. Try these sizes to see which one fits better.
I once helped a friend find her sister sizes after she struggled with her standard size. She tried a 34DDD and found it much more comfortable than her usual 36DD. This small adjustment made a big difference in her comfort and support.
Sister sizes to 36DD offer a practical solution for achieving a better bra fit. By understanding how sister sizes work and trying different combinations, you can find the most comfortable and supportive bra for your body. Don't hesitate to explore sister sizes if your current bra isn't fitting well.