How to Find Your Bra Size at Home

Most of us choose a bra size once and keep buying it for years. Bodies change, and so do brands and styles, so it is worth re-checking your fit every so often. All you need is a soft tape measure, a mirror and two minutes.

Before you start

• Wear a non-padded, unlined bra, or none at all.
• Stand straight and relaxed, breathing normally.
• Keep the tape level all the way round. A mirror helps you check the back.

Step 1: measure your band

Wrap the tape snugly around your ribcage, directly underneath your bust where the band of a bra would sit. It should feel firm but not tight. Note the measurement.

Step 2: measure your bust

Measure loosely around the fullest part of your bust, keeping the tape parallel to the floor and without squashing the breast tissue.

Step 3: compare with the size table

The difference between the two numbers guides your cup size, and your band measurement guides your band size. Because every style is cut a little differently, always compare with the size table shown on the product you are viewing. Treat your result as a starting point, not a final answer.

Fit checks that matter more than the number

• The band does the work. It should sit level and not ride up at the back. Fasten a new bra on the loosest hook so you can tighten it as it relaxes.
• The centre sits flat. The middle section between the cups should rest against your chest.
• No gaps, no spill. Cups should hold you smoothly without wrinkling at the top or cutting in.
• Straps support, they do not lift. If straps dig in, the band is probably too loose.

When to size up or down

If the band rides up, try a smaller band. If it digs in or leaves marks, try a larger one. When you change band size, you may need to adjust the cup too, because cup volume is linked to band size.

Ready to try your size? Explore our everyday bras or read the full size guide.