Bonita Boutique

Size Calculator

A starting point for your perfect fit.

Already know your size? Use the UK size on your bra label and tell us how it fits. This calculator suggests a size to try; it does not calculate a size from body measurements.

I know my bra size

Use the UK size on a bra you already wear. This suggests a starting size to try with a fitter; styles and sizing systems vary.

Unsure of your current size? Book a free professional bra fitting or walk in.

I need help with sizing

Two measurements. A helpful starting point.

01

Underbust

Measure snugly right under your bust, in centimetres.

02

Bust

Measure around the fullest part of your bust, in centimetres.

  • Use a soft tape measure and wear a non-padded bra.
  • Stand straight, keep your arms relaxed and breathe normally.
  • Keep the tape level all the way around, snug without digging in.
  • Measure in front of a mirror and repeat both measurements to double-check.

Have your measurements ready when you contact your Bonita branch. A fitter can help you interpret them alongside your preferred style and fit.