A bra size calculator turns your two body measurements — the underbust (band) and the bust across the fullest part — into a band number and a cup letter. Victoria's Secret uses US bra sizing, so the US band number and cup letter the calculator returns is the size you start with when you shop a Victoria's Secret bra. Open the Bra Size Calculator, choose inches or centimeters, type in your underbust and bust, and the tool prints your estimated US, UK and EU sizes at once, updating as you type. That US number is the one to look for on a Victoria's Secret product page.
Many shoppers land on the Victoria's Secret site or in a fitting room without knowing their size, and the brand's range of band and cup combinations covers a lot of ground, but it only helps if you arrive at a starting point that actually fits. Two measurements and a calculator close that gap in under a minute and let you walk into the brand with a real size rather than a guess.
Why Victoria's Secret Uses US Sizing
Victoria's Secret labels its bras with US sizing, the same numbering and lettering system used across North American lingerie brands. The format is straightforward: a number, the band, 28 through the mid-40s, followed by a letter, the cup, running A through roughly K depending on the style. Because VS sits inside the US system, a calculator that outputs US sizes lines up directly with what the brand's site and stores expect to see on the tag.
Historically, US retailers — and Victoria's Secret is no exception — calculated the band by adding 4 or 5 inches to the underbust measurement and then picking the cup from the difference between the bust and that inflated band. That older method gave larger band numbers and smaller cups than the modern approach, and it is one reason shoppers often end up in a band that is too loose and a cup that is too small at VS. Today's calculator uses the modern rule, underbust rounded to the nearest even number, which lines up with how VS cuts most of its current collections. Knowing the difference helps you understand why a calculator's number can look smaller than the chart a friend swears by.
How to Measure Yourself for a Victoria's Secret Bra
Two measurements run the whole calculation: underbust and bust. Get them right and the calculator does the rest. Treat this step as part of the Victoria's Secret sizing process, not a separate chore, because the numbers you type in decide the size you walk out with.
- Underbust (band): Stand in front of a mirror with a soft fabric tape. Wrap it snug and level around your ribcage directly under your bust, where the band of a bra sits. Exhale normally, then read the number to the nearest quarter inch.
- Bust: Measure loosely around the fullest part of your bust, keeping the tape parallel to the floor. Do not pull tight — you want the natural circumference, not a squeezed one.
- What to wear: Measure braless or in a thin, non-padded bra. Shaping or push-up pads add bulk and skew the bust number upward, which can push your cup letter higher than your true fit.
- Units: Pick inches or centimeters in the calculator before typing. Switching units mid-way gives you a result that has nothing to do with your body.
Calculate Your Victoria's Secret Bra Size
- Open the Bra Size Calculator and choose inches if you measured in inches, or centimeters if you used centimeters.
- Type your underbust measurement into the band field — the snug number you took right under the bust.
- Type your bust measurement into the bust field — the loose number taken across the fullest part.
- Read the US result the calculator returns: a band number and a cup letter. That is your Victoria's Secret starting size.
- Note the UK and EU sizes the tool prints alongside. If you are shopping a UK or EU brand with the same measurements, use those instead.
- Try the size on if you can. A bra that fits should sit level around the ribcage, the band should feel snug without digging, and the cups should contain the breast without spillage or gapping.
US, UK and EU Bra Size Differences
The same measurement does not always mean the same letter across regions. Band numbers mostly agree — both the US and the UK use inches for the band, while the EU converts the band to centimeters — but cup letters drift apart once you pass D. The table below lists the cup letter each region uses at a given inch difference between bust and band.
| Cup difference (in) | US | UK | EU |
|---|---|---|---|
| 1 | A | A | A |
| 2 | B | B | B |
| 3 | C | C | C |
| 4 | D | D | D |
| 5 | DD | DD | E |
| 6 | DDD | E | F |
| 7 | G | F | G |
On the band side, a US 34 is an EU 75 and a US 32 is an EU 70, because the EU measures the band in centimeters rather than inches. VS uses the US system, so when you want to convert your VS size to a UK or EU label — for example when a sister brand sells the same bra in Europe — a dedicated Bra Size Converter handles the band shift and the cup letter split in one click.
Worked Example: From Two Numbers to a VS Size
The conversion is short enough to walk through once. Suppose the underbust reads 32.0 inches and the bust reads 36.0 inches.
- Band: The underbust rounds to the nearest even number. 32.0 is already even, so the band is 32.
- Cup: The difference is bust − band = 36 − 32 = 4 inches. Four inches of difference maps to a D cup.
- US result: 32D. That is the size to look for on a Victoria's Secret product page.
- UK result: 32D as well, since cup letters agree up to D.
- EU result: The band shifts to 70 (centimeters) and the cup stays D, so 70D.
Run the same numbers through the Bra Size Calculator and you should see the same 32D / 32D / 70D triple printed at once.
Sister Sizes and Fit Adjustments at Victoria's Secret
If your underbust sits between two even numbers — say 31.4 inches — the calculator rounds to the nearest even band (32) and that becomes your starting point. If you fall between sizes, try the sister size as well. A sister size keeps the cup volume roughly the same and trades band tightness for cup room: going down a band and up a cup gives a snugger fit with a larger letter, while going up a band and down a cup gives a looser band with a smaller letter.
VS cuts bras differently across styles — a Body by Victoria push-up tends to fit closer in the band than a Dream Angels demi, for example, and a wireless bralette stretches differently from an underwire plunge. When the calculator's size feels tight in the band, try the sister up. When the band rides up your back, try the sister down. Either way, the cup should fully contain the breast without spillage or loose fabric at the top.
Signs Your Victoria's Secret Bra Does Not Fit
A few patterns show up again and again when shoppers bring a calculated size into a Victoria's Secret fitting room. Spotting them early saves you from settling on a size that almost works.
- Band too loose: If the band rides up your back between the shoulder blades, the band is too big. Most of the bra's support comes from the band, not the straps, so a loose band pushes the whole bra out of place.
- Cup too small: If the breast spills over the top or the side of the cup, the cup letter is too low. Spillage almost always means go up a cup, not go up a band.
- Cup too large: If the cup wrinkles or gaps at the top, the cup letter is too high. Try a sister size down a cup and up a band, or pick a more shallow-cut VS style.
- Trusting the old +4 rule: Charts online that tell you to add 4 or 5 inches to your underbust belong to the older US sizing method. They give a larger band and a smaller cup than most modern calculators, and following them at VS tends to land you in a band that is too loose and a cup that is too small.
The calculator gives you a solid estimate, but real cup and band sizing varies between brands, styles and materials, and bodies change over time. Use the US number as your starting point, then try the bra on: the band should sit level and snug and the cups should fully contain the breast without gaps or spillage.