Shopping would be so much easier if sizes were honest. Until they are, these free tools do the translating for you — your shape, your sizes and your measurements, worked out properly instead of guessed. Every tool is free, none of them ask for your email, and nothing you type is stored anywhere.
Start with the measurement you have, and each tool explains what your result actually means for how clothes, shoes and jewellery fit.
Fit & Shape
Body Shape Calculator
Four quick measurements — bust, waist and hips — reveal which of the seven body shapes you are, with styling tips matched to your proportions at any size.
Bra Size Calculator
Two measurements and the modern fitter’s method give your US and UK bra size, your sister sizes and a four-point fit check — no outdated add-four guesswork.
Body Frame Size Calculator
Your wrist and height tell you whether your bone structure is small, medium or large frame — and what that means for clothing fit, watches and bracelets.
Size Conversion
Dress Size Converter
Convert women’s dress sizes between the US, UK, EU, AU, FR, IT, DE and JP systems in one tap — or skip the label entirely and find your size from your measurements.
Shoe Size Converter
Turn your real foot length into US, UK, EU, AU and JP shoe sizes, with honest width guidance for the fit your feet actually need now.
Ring Size Calculator
From your finger’s circumference — or the diameter of a ring that already fits — get your US, UK, European, French and Japanese sizes, with the full chart to double-check.
Health & Measurement
Waist to Hip Ratio Calculator
Work out your waist-to-hip ratio against the WHO bands for women, plus your waist-to-height ratio — explained calmly and clearly, without scare tactics.
Hair Tools
Face Shape Finder
Measure four points — or take the four-question quiz — to pin down your face shape, then see the hairstyles, lengths and fringes that flatter it most.
Hair Growth Calculator
Tell it where your hair is now and where you want it to be, and it works out how many months that takes — your trims included — and the month you’ll get there.
Nail Tools
Nail Shape Finder
Four questions about your nail beds, your fingers and your real life point you to the nail shape that will suit you — and actually survive your week.
Makeup & Style
Undertone Finder
Your veins, your jewellery and how your skin meets the sun reveal whether you’re warm, cool, neutral or olive — then get the nail colours, hair colours and makeup shades that love you back.
How these tools work
Every calculator here runs on the standard published size charts and measurement methods that fitters, jewellers and tailors actually use — the same tables you’ll find in our guides, shown in full on each tool page so you can check any result by hand. Measure carefully (each page shows you exactly how), and re-measure when things change: bodies shift over time, and an honest measurement from this morning beats a label from five years ago.
Looking for ideas once you know your numbers? Browse our hairstyles, nail designs and fashion guides — most tools above link straight to the articles that suit your result.