Bra Size Calculator
Finding the right fit starts with knowing your cup and band size. Our bra size calculator works in minutes with just a tape (or string and ruler). If you have a bra handy, the quiz helps confirm your true fit. With both tools, you can easily find comfort and support.
Bra Measurement Calculator
No bra to use? No problem. All you’ll need is a tape measure (or a piece of string and a ruler), and we’ll guide you to your size.
How it works:
- Grab a tape measure, or use a piece of string with a ruler.
- Measure your overbust and underbust.
- Get your recommended bra size.
Bra Size Quiz
Using your own bra and a few expert-designed fit questions, we’ll check if you’re in the right size—or if a different size could give you a better fit.
How it works:
- Put on the bra that fits you best.
- Answer a few quick fit questions.
- Discover whether your current size is recommended—or if we suggest a new one.
Tips for best results:
- Wear a non-padded bra.
- Use a bra less than 6 months old (older bras may stretch out).
- If your bra is over 6 months old, try ordering the same style again—it may just be worn out.
- Avoid using a bra extender (if you do, we’ll ask extra questions to adjust).
Disclosure: The results from this quiz and calculator are intended as guidance only and are based on the information you provide. Results may not be 100% accurate.
Finding the right fit can feel confusing, which is why we’ve created an easy-to-use bra size calculator for anyone starting from scratch. If you’ve ever wondered how to measure your bra size or how to work out your bra size correctly, this tool is designed to guide you. By entering a few simple measurements, the calculator quickly provides your band and cup size, helping you identify your correct bra size with confidence. Our step-by-step approach makes the process simple and stress-free, ensuring your measurements translate into a comfortable, supportive fit. It also gives you the clarity you need to calculate your cup size without guesswork or frustration.
For those who already own a bra, the bra size quiz offers a different route. Rather than focusing on new measurements, it asks specific questions about how your current bra feels. This makes it ideal for checking whether your bra truly fits as it should or if you might need a different size. And if you’re unsure how to measure for a bra to compare against your quiz results, the calculator is always there to give you precise, measurement-based guidance. Like the bra size calculator, the quiz is designed for accuracy and reassurance, so you can trust the results you receive.
Step 1: Measure Your Underbust
Steps
- Step 1: Wrap a soft tape (or string) around your rib cage, directly under the bust, keeping it level.
- Step 2: Keep the tape snug but not tight, then note the number.
- Step 3: If it’s odd, round up to the next even number (e.g., 35.2 → 36).
Steps
- Step 1: Wrap a soft tape (or string) around your rib cage, directly under the bust, keeping it level.
- Step 2: Keep the tape snug but not tight.
- Step 3: Round up to the nearest cm in the lists provided.
- You should be able to fit two fingers under the back.
- No tape? Use string, mark where it meets, then lay it flat against a ruler.
- You should be able to fit two fingers under the back.
- No tape? Use string, mark where it meets, then lay it flat against a ruler.
Step 2: Measure Your Overbust
Steps
- Step 1: Wrap a soft tape (or string) around the fullest part of your bust, keeping it level all the way around.
- Step 2: Keep the tape snug but not tight.
- Step 3: Record the number to the nearest whole inch.
Steps
- Step 1: Wrap a soft tape (or string) around the fullest part of your bust, keeping it level all the way around.
- Step 2: Keep the tape snug but not tight.
- Step 3: Round up to the nearest cm in the list provided.
- Take a deep breath in and out to be sure the tape isn’t too tight.
- Take a deep breath in and out to make sure the tape isn’t too tight.
For the most accurate results:
- Wear a non-padded bra.
- Use a bra less than 6 months old (older bras may stretch out).
- If your bra is over 6 months old, try ordering the same style again—it may just be worn out.
- Avoid using a bra extender (if you do, we’ll ask extra questions to adjust).
What hook is your bra currently on?
When wearing your bra, where does the back of the band sit?
When you lift your arms above your head, does the bra move with you?
How far can you stretch the back of the bra? i
- Pull the backband out from your back as far as possible.
- Measuring yourself? If you can’t reach, pull the band from under your arm instead.
- Note how far the band stretches. (One finger width ≈ 1 inch.)
- If it’s tricky, ask a friend to help.
Does the centre piece lie flat between your breasts?
When pressing the underwire near your armpit, do you feel it on your boobs or ribs? i
Do you notice any breast tissue overflowing?
Do you notice any wrinkling or loose material in the cups? i
- Adjust straps so they’re snug but comfortable.
- Straps that are too loose can cause wrinkling.
- You should be able to fit two fingers between the strap and your shoulder.
Get Your Results!
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Your Recommended Size
Please note: we use UK bra sizing for consistency.
Shop NowDisclosure: The results from this quiz and calculator are intended as guidance only and are based on the information you provide. Results may not be 100% accurate.
