The "plus four" rule in bras refers to a guideline for determining the correct band size. It suggests adding four inches to your underbust measurement to find your bra band size, though this method is now considered outdated by many experts. Modern bra fitting often involves more precise measurements and considerations for comfort and support.
Understanding the "Plus Four" Rule in Bra Sizing
The "plus four" rule was a popular, albeit simplified, method for determining bra band size. It was widely used for many years. The idea was to measure your ribcage directly under your bust. Then, you would add four inches to that measurement. This sum would then correspond to your bra band size.
For example, if your underbust measurement was 30 inches, adding four would give you 34 inches. This would then translate to a 34 band size. This method aimed to account for the ease needed in a bra band for comfort and movement. However, it often led to ill-fitting bras, especially for individuals with different body shapes.
Why Was the "Plus Four" Rule Used?
This rule emerged when bra manufacturing and fitting were less sophisticated. Manufacturers often used a standard formula. This formula aimed for a general fit across a broad range of customers. The added inches were meant to compensate for the bra’s construction and the natural expansion of the ribcage during breathing and activity.
It was a simple, accessible method for consumers to try and find a bra size at home. Without professional fitting, this rule offered a starting point. It was believed to provide a snug yet comfortable fit.
The Limitations of the "Plus Four" Rule
While seemingly straightforward, the "plus four" rule has significant drawbacks. It doesn’t account for individual body shapes, such as a smaller ribcage with a larger bust or vice versa. This can lead to a band that is too loose or too tight.
A band that is too loose won’t provide adequate support. This can cause the bra straps to dig into the shoulders. Conversely, a band that is too tight can be uncomfortable and restrict breathing. It can also create unflattering bulges.
Modern Bra Fitting Methods: A Better Approach
Today, bra fitting has evolved. Experts emphasize a more accurate measurement process. This typically involves two key measurements: the underbust and the bust.
The underbust measurement is taken snugly around the ribcage, directly beneath the bust. This measurement is crucial for determining the band size. The bust measurement is taken around the fullest part of the bust. The difference between these two measurements helps determine the cup size.
Many lingerie specialists recommend professional fittings. They can assess the fit of the band, cups, and straps. They also consider the bra’s style and your specific needs. This personalized approach ensures better comfort and support.
How to Measure for a Bra Today
To get a more accurate bra size, follow these steps:
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Measure your underbust: Wear a non-padded bra or no bra. Wrap a soft measuring tape around your ribcage, directly under your bust. Ensure the tape is level all around and snug. Round to the nearest inch. This is your band size base.
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Measure your bust: Wrap the tape measure around the fullest part of your bust. Keep the tape parallel to the ground. Do not pull the tape too tight.
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Calculate your cup size: Subtract your underbust measurement from your bust measurement. The difference in inches corresponds to your cup size.
- 1 inch difference = A cup
- 2 inch difference = B cup
- 3 inch difference = C cup
- 4 inch difference = D cup
- 5 inch difference = DD (or E) cup
- And so on, with each additional inch typically representing a larger cup size.
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Determine your bra size: Your band size is usually the rounded underbust measurement. Your cup size is determined by the difference. For example, if your underbust is 32 inches and your bust is 37 inches, your difference is 5 inches, suggesting a D cup. Your bra size would be 32D.
What to Look for in a Well-Fitting Bra
A well-fitting bra should feel comfortable and provide excellent support. Here’s what to check:
- Band: The band should be snug and parallel to the floor. You should be able to fit two fingers comfortably underneath it. It provides about 80% of the bra’s support.
- Cups: Your breasts should be fully enclosed in the cups without bulging over the top or sides. There should be no gaping.
- Straps: Straps should stay in place without digging into your shoulders. They should complement the band’s support, not bear the primary weight.
- Center Gore: The center panel of the bra (the gore) should lie flat against your sternum. This ensures the cups are positioned correctly.
Common Bra Sizing Mistakes to Avoid
Many people wear the wrong bra size. The "plus four" rule contributed to this. Here are common mistakes:
- Relying solely on the "plus four" rule: As discussed, this is often inaccurate.
- Wearing the same size for years: Your body changes. Weight fluctuations, hormonal changes, and aging can all affect your bra size.
- Ignoring the band fit: Many women choose a larger band size to compensate for a too-tight band, when they actually need to go down a band size and up a cup size.
- Not trying different styles: Different bra styles offer varying levels of support and coverage. What works for one person might not work for another.
People Also Ask
### How do I know if my bra band is too loose?
If your bra band rides up your back, you can easily fit more than two fingers underneath it, or the straps constantly slip off your shoulders, your band is likely too loose. A loose band compromises the bra’s support and can lead to discomfort.
### What is the difference between band size and cup size?
The band size refers to the measurement around your ribcage, which provides the primary support for the bra. The cup size refers to the volume of the breast and is determined by the difference between your bust and underbust measurements. Together, they form your bra size, like 34C.
### Is it better to go up a band size or a cup size?
It’s often better to adjust your cup size first if your breasts are spilling out or if there’s gaping. If the band feels too tight or too loose, you might need to adjust the band size. A common adjustment is to go down one band size and up one cup size if your current bra feels too tight in the band but the cups fit.
### How often should I get fitted for a bra?
It’s recommended to get professionally fitted for a bra at least once a year. You should also consider getting fitted if you experience significant weight changes, hormonal shifts (like during pregnancy or menopause), or notice your current