What is Sister Sizing?

Sister sizing is a method of adjusting bra sizes to find an alternative that still offers the same cup volume but with different band sizes. The principle behind sister sizing is quite simple:

• Going down a band size requires going up a cup size.
• Going up a band size requires going down a cup size.

For example, if your usual size is a 34D, your sister sizes would be 32DD (a smaller band, larger cup) and 36C (a larger band, smaller cup). This flexibility can be a lifesaver when your usual size isn’t available or when you’re experiencing band fit issues.

Benefits of Sister Sizing:

Accommodating Band Fit Issues

If the band of your bra feels too tight or too loose, sister sizing allows you to adjust without changing the volume of the cup. This is especially useful if you find yourself between sizes or if the fit varies from brand to brand.

Brand Variations

Different lingerie brands may have slight variations in sizing, so what works in one brand might not fit well in another. Sister sizing helps you find the right fit, even when the size you typically wear isn’t available.

Availability

When your exact size is out of stock, sister sizing offers an alternative that might fit just as well. It expands your options, especially when you're in a pinch.

Gift Buying

When purchasing lingerie as a gift, it can be difficult to know the recipient’s exact size. Sister sizing can help you choose a size that’s likely to fit, even if you're not entirely sure about the specifics.

How Sister Sizing Works:

Sister sizes typically follow a diagonal pattern on a sizing chart. For example, if you're a 36F, your sister sizes would be 34FF (a smaller band, larger cup) or 38E (a larger band, smaller cup). 

While sister sizing can give you more options, it’s essential to note that it’s not perfect. Some adjustments may still be needed depending on the bra's design and how it fits on your body.

Limitations of Sister Sizing:

Support Differences

A larger band size may provide less support, especially for fuller busts. It’s essential to consider the type of support you need and whether the fit change impacts the bra's effectiveness.

Design Variations

Not all bras are designed the same way, even if the sizing is the same. Some styles may be made for different body proportions, so even if the sister size seems to be a match, the fit or support may vary depending on the bra’s design.

Extreme Sizing

Sister sizing works best when staying within one or two sizes of your measured size. If you go too far beyond your usual size, the overall fit may become significantly different, and the bra may not provide the same support or comfort.

Tips for Using Sister Sizing:

Start with Your Measured Size

Begin by knowing your correct size. This serves as a baseline for finding a sister size that works for you. Check out our blog 'Finding Your Perfect Fit' to learn how to find your right bra size.

Only Sister Size One Step at a Time

For the best results, try to adjust your size only one step at a time, whether that’s a smaller or larger band size. Extreme changes may lead to a less comfortable fit.

Consider the Brand and Style

When using sister sizing, always take into account the brand and specific style of the bra. Some brands tend to run smaller or larger than others, so it’s helpful to consider these factors when adjusting your size.

Try It On

Whenever possible, always try on bras before purchasing. Even with sister sizing, the best way to know if a bra fits well is to see how it feels when you wear it.

Find Your Sister Size at Hidden Lace

Sister sizing is a valuable tool in lingerie shopping, offering flexibility and expanding your options when it comes to finding a comfortable, well-fitting bra. While it’s most effective when paired with proper fitting techniques and an understanding of your personal preferences, sister sizing can help you adjust when your usual size isn’t available or when you need to make slight adjustments for comfort. By using sister sizes wisely, you can enjoy a wider selection of bras that suit your body and your style. 

Warm regards,

The Hidden Lace Team