Cherry SizeHow to measure your bra size at home
To find your size, measure your underbust (snug and level, right under the bust) and your bust (fullest point), then read the band from the underbust and the cup from the difference between the two.
Before you start
- A soft (sewing) measuring tape — not a metal one
- A thin, non-padded bra, or no bra
- A mirror, to check the tape stays level
1. Measure your underbust
Wrap the tape around your ribcage directly under your bust. It should be snug — the tape stays put when you let go — but not digging in. Check in the mirror that it's parallel to the floor front and back, exhale normally, and note the number.
Snug means: you can slide two fingers under the tape, no more.
2. Measure your bust
Move the tape up to the fullest part of your bust — usually at nipple level. Here the tape rests lightly on the body without compressing anything. Keep it level, arms relaxed at your sides (ask for help or use the mirror).
If you're between two numbers, take the larger one for this measurement.
3. Get your size
Enter both numbers in the calculator — the underbust sets your band, the difference sets your cup. You'll get your size in EU, UK, US, FR and IT sizing, plus your sister sizes.
Four common fit checks
The band stays level
It shouldn't ride up in the back or lift when you raise your arms. If it does, the band is too big — the most common mistake.
The wire sits flat
The centre panel (gore) should rest against your sternum. If it floats away from the body, the cup is too small.
No spillage, no gap
Breast tissue shouldn't overflow the cup edge (cup too small), and the fabric shouldn't wrinkle empty (cup too big).
Straps don't carry the weight
Support comes from the band, not the straps. Straps digging into your shoulders usually mean the band is too loose.
When to re-measure
Your size follows your body: re-measure after a noticeable weight change, during and after pregnancy, while nursing, or if a well-fitting bra starts behaving differently. The Cherry Size app can remind you at the right moments and keep a private history of your measurements on your phone (with a subscription).
Bra sizes by brand
How each brand writes its sizes, its recorded range and its conversions:
BravissimoFreyaPanacheSKIMSThirdLoveVictoria's SecretWacoal America
Your size, everywhere you shop
Cherry Size keeps your measurements on your iPhone, translates them into 617 brands, tracks changes through pregnancy, nursing or weight shifts (with a subscription) — and never uploads a thing.
Scan with your iPhone to download the appIn the app, your size is free, and so is your size at 3 brands you choose. Every brand, the fitting room, the wardrobe and the journal need a subscription, with a free trial for eligible new subscribers.
