Why clothing sizes vary between brands
A medium at one brand is not a universal body measurement. Brands use different size ranges, patterns and intended fits. Even two products from the same label can feel different.
A label is not a measurement
Letters such as S, M and L describe a position within a brand's size range. Numeric systems can also differ between countries and clothing categories. A number on a jacket should not be interpreted as a trouser waist measurement.
When comparing brands, use the relevant body measurement ranges instead of assuming size labels convert directly. Check the category and department as well as the units.
Body charts and garment charts answer different questions
A body chart describes the person a size is intended to fit. A garment chart describes the finished piece of clothing. A garment usually has space added or, with some stretch designs, reduced relative to body measurements. The amount depends on its design.
Do not compare your chest circumference directly with a flat chest width or add room to a body chart as though it were a garment chart. Read the measurement definitions before deciding which numbers to compare.
Use your usual size as a clue
A size that fits you well elsewhere is helpful context, especially if you know whether it feels snug, balanced or loose. It is not a precise measurement. The fabric and cut of that familiar piece may differ from the one you want to buy.
Our directory helps you explore reference charts in one place. These approximate references do not guarantee that every current product follows them. Always confirm current product guidance with the retailer before ordering.