Bra fitting guides
Practical, body-neutral guides to UK bra sizing, from taking your measurements to checking the fit in the fitting room.
These guides explain how UK bra sizes work, how to measure accurately, and how to tell whether a bra fits. They also cover what to do when a measured size does not feel right, how breast shape and bra style affect fit, and how sizing changes through pregnancy, after surgery and when choosing a first bra. Each guide links to the sizing tools it explains, so you can move from reading to checking your own size.
Measuring
How to measure
The four measurements, step by step, with diagrams.
Common measuring mistakes
The errors that most often give the wrong size.
Accuracy and limitations
What a calculator can and cannot tell you.
Understanding sizes
How UK bra sizes work
What the number and the letters mean.
Sister sizes explained
Why 34C, 32D and 36B share a cup volume.
UK bra size chart
Every UK band and cup in inches and centimetres.
Getting the fit right
How to tell if your bra fits
A step-by-step fit check for the fitting room.
Bra fit problems
What causes each fit problem, and the fix.
Why your size feels wrong
Brand, shape, style and method differences.
Breast shapes and bra styles
How shape affects which styles fit.
Life stages and specialist fitting
Pregnancy bra size changes
When to re-measure and what to buy.
Post-mastectomy bra fitting
Pockets, band comfort and specialist fitting after surgery.
First bra guide for parents
For parents and carers supporting a first bra.
Bra styles
Bra styles
How each bra style is built and who it suits.
Sizing tools
Sister Size Calculator
Every size with the same cup volume, and when to try each.
Bra Size Converter
UK, US, EU, FR, and AU sizes side by side.
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Cup Volume Comparison
See which of two bra sizes holds more, and understand why.
Fit Diagnosis
Select your fit problems and get a specific size to try.
No Tape Measure
Get a rough bra size estimate from a bra you already own or your dress size.
Nursing Bra Calculator
Find your bra size through pregnancy and breastfeeding.
Sports Bra Calculator
Find the right size and support type for your activity.
Plus Size Bra Calculator
Find the right size for larger bands and fuller cups.
Strapless Bra Size
Find the firmer band size a strapless bra needs for a secure fit.
Size Tracker
Track bra size changes over time, with your data stored only on your device.
Bra size calculator
Four measurements, both band methods, sister sizes and a confidence score.
