Introduction
Are you searching for the perfect bra but struggling to distinguish between the terms "underbust" and "overbust"? Then, this guide is just for you! These two measurements have a slight difference, but this very difference will make all the impact when you're picking your ideal bra size. To ensure that your bra fit is neither too tight nor too loose, but just right—understanding the clear difference between an overbust and underbust is key. So, whether you're shopping for everyday bras, plus size bras, or a removable padded bra, this guide has all the answers for you in terms of correct bra measurements—covering in detail how to measure properly, understand cup size, and avoid common mistakes.
What Is Underbust?
An underbust, a term popularly used for bra measurements, is simply the area where your bra band fits snugly, which is the circumference of your rib cage just below your breasts.
How to Measure Your Underband (Underbust) Correctly
Make sure to stand straight with your arms relaxed by your sides.
Put a measuring tape around the fullest part of your chest, usually where your nipples are.
Keep the tape level and make sure it's snug but not too tight or too loose, as it should sit comfortably without pressing into your breasts.
Check the number on the tape in inches or centimetres and round it to the nearest whole number.
Why Measuring Underbust Is Important
When you choose a bra with a well-fitted underbust measurement, such as for styles like a removable padded bra or plus size bra, it ensures just the right support, comfort and lift that your bust requires, providing proper anchoring without digging into your skin or feeling too loose.
What Is Overbust?
An overbust simply refers to the measurement that is taken around the fullest part of your breasts, such as the band area above the bust or around your nipples.
How to Measure Your Overbust Properly
Once you stand up straight, keep your arms relaxed by your side.
Wrap a measuring tape around the fullest part of your chest, usually where your nipples are.
Make sure the tape is level and not too tight or too loose, making sure it fits comfortably against your body without squeezing your breasts.
Read the measurement in inches or centimetres and round it to the nearest whole number.
The Key Differences Between Underbust and Overbust
To clearly understand the difference between overbust and underbust, the table below outlines it in a very clear yet simple way:
| Aspect | Underbust | Overbust |
| Location | Measured around the band area directly beneath the bust. | Measured around the band area above the bust, covering the fullest part of the breasts. |
| Support | Provides foundational support to the breasts through the band. | Offers lift and shapes the breasts through the cup. |
| Fit | Should feel secure and supportive without being too tight. | Should comfortably accommodate breast tissue without compressing or digging in. |
| Common Styles | Often emphasised in bralettes and sports bras. | Key focus in push-up and balconette bras. |
| Common Issues | A loose band can ride up, reducing support. | Cups that don't fit well may gape or cause discomfort. |
| Recommendation | Have your band size professionally measured for accuracy. | Experiment with various bra styles to find what flatters you best. |
How Cup Size Is Determined Using Overbust and Underbust
It is extremely simple! Once you have measured your overbust and underbust, go ahead and subtract the two measurements. The difference between the two in inches will then represent your cup size. For example, a 1-inch difference is A cup, a 2-inch difference is B cup, a 3-inch difference is C cup and so on. Go ahead and refer to a bra size chart from brands like Krvvy to help ease your understanding!
Common Mistakes to Avoid When Measuring Your Bra Size
You may not even realise it, but you could be making the following errors when trying to measure your bra size, which can further impact the accuracy of the measurement:
Measuring Over Clothes: You will not be provided an accurate bra measurement if you measure over clothes, as it adds bulk, which is why it is recommended to measure directly on the skin or using a non-padded bra.
Wearing Padded or Push-Up Bras While Measuring: It is best to avoid wearing these, as these again add extra padding and volume, which can, in turn, affect your natural shape while measuring.
When Tape Is Too Loose or Too Tight: The measuring tape should be tight enough to stay in place but not squeeze you, because if it's too tight, your size will look smaller, and if it's too loose, your size will look bigger.
Not Updating Your Measurements Regularly: Our bodies constantly change as we grow older or gain or lose weight, which is why it's good to measure yourself every 6 to 12 months to make sure your bra fits well.
Final Thoughts
Finding accurate measurements for both overbust and underbust is key, as without these, it becomes very difficult to determine the right support and comfort level for your bra fit. No matter if you're looking at plus-size bras, a removable padded bra, or just aiming to figure out your ideal over-bust size, these measurements can help open the door to better fit, support, and self-assurance. Also, referring to a reliable bra size chart goes a long way for reference purposes!
Choose brands like Krvvy that understand how important a perfect fit is—for everybody—by making bras that focus on real, accurate measurements rather than a one-size-fits-all approach, thereby ensuring you find styles that truly suit both your shape and needs!
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