Key points
- Body measurements are more reliable than the size printed on old clothes.
- Brand size charts should win over generic conversion tables.
- Fit depends on garment cut, fabric stretch and personal preference.
Measure the body, not the label
Clothing labels vary by country, brand and garment type. The best starting point is a fresh set of body measurements. Use a flexible tape, stand naturally and keep the tape level. Do not pull it tight enough to indent the body. The aim is a real measurement, not the smallest possible number.
Key measurements
For many garments, bust, waist and hip are the core measurements. Jeans often need waist, hip and inside leg. Bras need underbust and full bust measurements, but shape and style can still change fit. Dresses may need all of these because the limiting measurement can be different depending on the cut.
International conversion is a guide
UK, US, EU and international sizes do not map perfectly. A generic conversion can help narrow the search, but the brand's own chart should be checked before buying. This is especially important for fitted garments, occasionwear and items with limited stretch.
Allow for style and fabric
A bodycon dress, relaxed shirt and tailored blazer may all use the same body measurements differently. Stretch fabric, lining, waist placement and shoulder shape affect the final fit. If you are between sizes, consider the garment's intended fit and whether alteration is realistic.
Related calculators
Put the guide into practice
Open the calculators that match this topic and test the numbers with your own inputs.