Choosing designer sizes online: a practical fit guide

Designer size labels can vary between brands and styles. A little preparation helps you compare the options without relying on a universal letter-size conversion.

Start with the original code

IT means Italian sizing, EU European, UK British and US American. Use the system printed on the product page. Letter equivalents such as S or M are references rather than garment measurements. The same letter can represent a different fit across designers.

Measure before choosing clothing

Keep a tape level and measure bust or chest at the fullest part, waist at its natural narrowest point and hips at the fullest part. Record your measurements in centimetres. Comparing the fit of a similar garment you already own can also help you decide which measurements to ask for.

For example, the Dolce & Gabbana white cotton dress shirt and Gucci blue cotton flared jeans use the size options shown on their individual pages. Check the material description as well as the size code; a label alone does not confirm stretch or fit.

Measure both feet for shoes

While standing, measure from heel to longest toe on each foot and use the larger measurement. Shoe width, last and heel height can affect comfort. Follow the listed size system for the pair you are considering, such as the Tom Ford mid-heel pumps or Gucci low-top sneakers.

Ask for the information you need

If the listing does not provide a measurement you need, contact us before ordering. Include the product link, the original size code and the exact measurement or fit question. We will check what information is available rather than guess.

Our size and measuring guide is available beside size selectors. Read the return terms before purchasing: change-of-mind returns require notification within the stated period, and return postage is paid by the customer. Current availability, prices and sizes are shown on each product page.