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01
Calculate band size
- Wrap the measuring tape snugly under your bust, parallel to the floor.
- Round to the nearest whole number. If even, add 4 inches; if odd, add 5.
- The result is your band size.
Example: 25.6″ rounds to 26. Band size = 26 + 4 = 30
Bra Size Calculator & Guide
Find Your Perfect Fit
Wearing the right size isn't just about comfort—it's about confidence. Our interactive guide helps you discover your true measurements for both bras and panties in just a few simple steps.
Bra Guide
Measure under your bust (Band) and across the fullest part of your chest (Bust).
How to Measure Bra Size
Most women wear the wrong bra size without knowing it. Our step-by-step guide and calculator help you find your true measurements in minutes — so every piece you choose feels as good as it looks.
02
Calculate bust size
- Wrap the tape around the fullest part of your bust.
- Keep it level — not too tight, not too loose, and without twists.
- Round to the nearest whole number.
03
Find your cup size
Subtract your band size from your bust measurement.
Each inch of difference equals one cup size: 1″ = A, 2″ = B, 3″ = C, and so on.
Example: Bust 37″ − Band 34″ = 3″ difference → 34C
Measurement Tips
A few simple habits make all the difference when measuring at home.
Do's
Don'ts
Wear a non-padded bra.
Pull the tape too tight or leave it too loose.
Stand straight with relaxed shoulders.
Measure over bulky or padded clothing.
Breathe normally — don't hold your breath.
Round fractions down — always round up to the nearest whole number.
Keep the tape flat against your skin.
Do's
Wear a non-padded bra.
Stand straight with relaxed shoulders.
Breathe normally — don't hold your breath.
Keep the tape flat against your skin.
Don'ts
Pull the tape too tight or leave it too loose.
Measure over bulky or padded clothing.
Round fractions down — always round up to the nearest whole number.
How to Measure — Visually
Prefer a visual walkthrough? This short guide walks you through each measurement step.
Bra Size Chart
Cross-reference your measurements to confirm your fit.
| Band | Underbust (in) | A | B | C | D | E | F |
|---|---|---|---|---|---|---|---|
| 28 | 23–25 | 28–29 | 29–30 | 30–31 | 31–32 | — | — |
| 30 | 25–27 | 30–31 | 31–32 | 32–33 | 33–34 | — | — |
| 32 | 27–29 | 32–33 | 33–34 | 34–35 | 35–36 | 36–37 | 37–38 |
| 34 | 29–31 | 34–35 | 35–36 | 36–37 | 37–38 | 38–39 | 39–40 |
| 36 | 31–33 | 36–37 | 37–38 | 38–39 | 39–40 | 40–41 | 41–42 |
| 38 | 33–35 | 38–39 | 39–40 | 40–41 | 41–42 | 42–43 | 43–44 |
| 40 | 35–37 | 40–41 | 41–42 | 42–43 | 43–44 | 44–45 | 45–46 |
| 42 | 37–39 | 42–43 | 43–44 | 44–45 | 45–46 | 46–47 | 47–48 |
| 44 | 39–41 | 44–45 | 45–46 | 46–47 | 47–48 | 48–49 | 49–50 |
All measurements in inches.
Does Your Bra Fit Correctly?
You've found your size — now make sure it feels right. Check these three areas before you buy.
Cups
What should the cups look like?
Breasts are fully contained with no spillage or gaping.
No creases, wrinkles, or empty space at the top.
Spillage over the cup edge
Gaping or empty space
Underwire sitting too low
Band
What should the band feel like?
Snug and level across your back — not digging in, not riding up.
Secure on the loosest hook with room to tighten over time.
Band riding up in the back
Band digging into your sides
Straps
What should the straps feel like?
Comfortably in place on your shoulders without slipping.
They should support, not carry the full weight of your bust.
Straps digging into shoulders
Straps constantly slipping off
Common Questions
Use a piece of string around your bust and band, then measure the string flat against a ruler. We still recommend a soft fabric measuring tape for the most accurate results.
Why Trust Our Fit Guide?
Built by lingerie specialists, our calculator and sizing guide are designed for real bodies — helping you shop with confidence, every time.
Shop Your Size