How to Measure Your UK Bra Size

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While stores typically have varying bra size guides, there are generally two things you need to calculate when measuring your bra size: your band size and your cup size. To do this, all you need is a measuring tape. By subtracting your band measurement from your cup measurement, you'll be able to determine your cup size. With your bra size figured out, you'll be able to pick out a bra that's just right for you.

Method 1
Method 1 of 2:

Finding Your Band and Cup Measurements

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  1. Find a fabric measuring tape that will wrap around your body, as well as a piece of paper and pencil or pen. It's best to use the measuring tape in inches, as this is how most UK bra measurements are taken. [1]
    • It may be useful to use a full-length mirror to see yourself as well.
  2. The measuring tape should go right under your bust where the band of your bra would sit. Pull the measuring tape so that it's snug but not too tight or loose, making sure it's in an even line around your body. Write down the band size on a piece of paper in inches, as this is how most bra sizes are taken in the UK. [2]
    • Stand up straight and have someone help you if necessary to ensure the measuring tape gives you an accurate measurement.
  3. If you'd rather take your measurements in centimeters, you'll need to round your measurements up or down to the nearest multiple of five before writing them down. Since bra sizes are mainly taken in inches, you'll need to go online and find a bra size calculator to then convert your measurements.
    • For example, if you measured your band size as 83 cm (33 in), you'd round that number down to 80.
    • When you plug your measurements into the online calculator, it will convert them from centimeters to inches before telling you your bra size.
  4. Pull the measuring tape around your bust to find the cup measurement—this will be the fullest part of your chest, about where your nipples are. Make sure the measuring tape is in an even line around your body, and write down the number so you don't forget. [3]
    • Many people say it's easiest to get an accurate measurement by wearing a non-padded bra, though you can measure yourself braless as well.
  5. Once you've measured around your ribcage for your band size and around your chest for your cup measurement, round these numbers up to the nearest whole inch. If your band size is an odd number, add 1 to make it even. [4]
    • Band and cup measurements of 29.8 in (76 cm) and 34.6 in (88 cm) would round up to 30 in (76 cm) and 35 in (89 cm) respectively.
    • If you measured a band size of 31 in (79 cm), you would round it up to the even number 32 in (81 cm).
  6. Take the rounded up measurements and subtract them from each other to end up with your cup size. The number difference between these two measurements will correlate to a letter. For example, a 1-inch difference would be an A, 2-inches a B, 3-inches a C, and so on. [5]
    • For example, if you subtract your band measurement from your cup measurement and get 4, you're a D cup.
    • A band measurement of 34 and a cup measurement of 37 would be a difference of 3, or a C.
    • If you're not sure which sizes correlate to which numbers, go online to find a cup size chart to refer to.
  7. Now that you have all of your measurements, just place your band size in front of your cup size and you're done! For example, if your band size is 34 and your cup size is a C, your bra size is 34C. [6]
    • Note that bra sizes vary widely between bra companies, so use this bra size as a reference point.
  8. After you've taken your band measurement and cup measurement, you can have the web calculate your bra size for you by typing them in to a bra size calculator. To find a site that will do these calculations for you, type “bra size calculator” into a search engine online. [7]
    • Most bra size calculators are found on a specific bra company's site, so be aware that you may get different sizes from different companies depending on how they measure bras.
Method 2
Method 2 of 2:

Ensuring a Bra Fits Well

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  1. This is the best way to determine whether a bra fits you well. Even if you've calculated your bra size according to the measurements, you won't know for sure if a bra is right for you unless you can try it on and evaluate whether it's comfortable and supportive. [8]
    • If you ordered a bra online, keep the tags attached while trying it on in case it doesn't fit well and you need to return it.
  2. If your bra straps are causing marks in your shoulders, or they're slipping off of your shoulders throughout the day, this is a sign that you're not wearing the right size. A fitted bra should have straps that sit on your shoulders comfortably without falling down or causing pain. [9]
    • Make sure your bra straps are even on both sides.
  3. If your bra band is riding up on your back or is uneven in any place, it's not the right size. Your band should rest evenly around your body without pulling up or down, and you should be able to fit two fingers under it snugly. [10]
    • Look in a mirror to ensure the band goes straight across your body and isn't uneven in any spots.
  4. The bra bridge is the piece of fabric that connects each cup of your bra, resting in the middle of your chest. This part should lay flat on your body without any room underneath. [11]
  5. If you can see the lines of your bra or any skin bulging, it's likely that this bra isn't the right size. Ideally, your bra won't be seen or felt when it's properly fitted. [12]
    • The cups of your bra should be smooth and moulded to your breasts.
    • If your bust is spilling out of your cups, you need to go up a size or two.
  6. Stores that sell bras know how challenging it can be to find the perfect bra, so many stores have employees that will measure you for the right bra while you're there. Call stores or go online to find out which ones have professional fitters who can help you find your bra size. [13]

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      Tips

      • If your bra is fitted properly, your breasts should sit comfortably between your elbows and shoulders.
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      • All bra companies and stores measure their bras in different sizes, so use the size guide of the specific company whose bra you intend on buying to ensure it fits you well.
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      References

      1. ↑ https://www.realsimple.com/beauty-fashion/clothing/shopping-guide/how-to-measure-bra-size
      2. ↑ https://www.glamourmagazine.co.uk/article/how-to-measure-your-bra-size
      3. ↑ https://www.vogue.co.uk/article/how-to-measure-for-a-bra
      4. ↑ https://www.glamourmagazine.co.uk/article/how-to-measure-your-bra-size
      5. ↑ https://www.glamourmagazine.co.uk/article/how-to-measure-your-bra-size
      6. ↑ https://www.glamourmagazine.co.uk/article/how-to-measure-your-bra-size
      7. ↑ https://www.calculator.net/bra-size-calculator.html
      8. ↑ https://www.glamourmagazine.co.uk/article/how-to-measure-your-bra-size
      9. ↑ https://www.realsimple.com/beauty-fashion/clothing/shopping-guide/how-to-measure-bra-size?slide=626198#626198
      1. ↑ https://www.glamourmagazine.co.uk/article/how-to-measure-your-bra-size
      2. ↑ https://www.glamourmagazine.co.uk/article/how-to-measure-your-bra-size
      3. ↑ https://www.vogue.co.uk/article/how-to-measure-for-a-bra
      4. ↑ https://www.glamourmagazine.co.uk/article/how-to-measure-your-bra-size

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