It is often said that it is important to find shoes that fit well, and the same goes for choosing the right bra. Size is one of the key pieces of information you need to know about bras. Wearing a well-fitting bra is essential, not just for comfort but also for your health and posture. Yet, it’s estimated that around 80% of women wear the wrong size without realizing it. So how do you determine your bra size? And how can you avoid common mistakes?
What tools do you need to calculate your size?
Before taking your measurements, make sure you’re in the right conditions. Good news: you don’t need much equipment!
- A soft measuring tape (ideally in centimeters)
- A mirror to check that the tape is placed correctly, horizontally and not too tight
- A non-padded bra to position the tape accurately without distortion from padding
How to measure your bra size
To determine your bra size, you need to take two measurements:
Step 1: Measure your underbust
Place the measuring tape directly under your bust, horizontally and parallel to the floor. It should be snug but comfortable—not too tight or too loose. This measurement will help you determine your band size.
Here is a chart to determine your back size:
| Bust measurement (en cm) | Corresponding size |
| between 68 and 72 | 70 |
| between 73 and 77 | 75 |
| between 78 and 82 | 80 |
| between 83 and 87 | 85 |
| between 88 and 92 | 90 |
| between 93 and 97 | 95 |
| between 98 and 102 | 100 |
Step 2: Measure your bust
To find your ideal cup depth, measure around the fullest part of your bust (usually at nipple level). As with the underbust, make sure the tape is straight and not too tight so you stay comfortable.
With these two measurements, you can consult the size chart to find your exact bra size.
| Bust measurement | Chest measurement (cm) |
| Size EU | B | C | D | E | F | G | H |
| 70 | 84-86 | 86 - 88 | 88 - 90 | 90 - 92 | 92 - 94 | 94 - 96 | 96 - 98 |
| 75 | 89 - 91 | 91 - 93 | 93 - 95 | 95 - 97 | 97 - 99 | 99 - 101 | 101 - 103 |
| 80 | 94 - 96 | 96 - 98 | 98 - 100 | 100 - 102 | 102 - 104 | 104 - 106 | 106 - 108 |
| 85 | 99 - 101 | 101 - 103 | 103 - 105 | 105 - 107 | 107 - 109 | 109 - 111 | 111 - 113 |
| 90 | 104 - 106 | 106 - 108 | 108 - 110 | 110 - 112 | 112 - 114 | 114 - 116 | 116 - 118 |
| 95 | 109 - 111 | 111 - 113 | 113 - 115 | 115 - 117 | 117 - 119 | 119 - 121 | 121 - 123 |
| 100 | 114 - 116 | 116 - 118 | 118 - 120 | 120 - 122 | 122 - 124 | 124 - 126 | 126 - 128 |
What is your bra size?
Thanks to these two measurements, you can now identify your size using our chart. For an even easier calculation, visit our size guide on the website and use the automatic calculator to find your perfect fit.
Tips for a Perfect Fit
To ensure your bra fits properly, pay attention to the following:
- Your breast should fill the cup completely, without empty space at the bottom
- The bra should not ride up in the back—it should stay straight and parallel to the floor
- Your bust should not spill out of the cups, either at the top or sides
- The center gore (between the cups) should lie flat against your sternum
So, after reading these tips, are you wearing the right bra size?
If you’re unsure, try several sizes to find the one that feels most comfortable and properly supports your bust. You can also test sister sizes to fine-tune your comfort level.
Now that you know your bra size,
👉 Discover which bra is best for sagging breasts to combine support and comfort every day.
