Sarah Shotton, creative director at Agent Provocateur, outlines the telltale signs that something is wrong: “You’ll know in a hurry that your bra’s not the right size when you’re spilling everywhere, ...

Measure your band size: Measure (in inches) firmly around your ribcage, just below where your bra fits. This will provide ...

If you’re not buying a sports bra in traditional band and cup sizes, check your band and cup size against the brand’s size ...

Fit the band. A sports bra's band does most of the legwork supporting your breasts, so make sure it's snug around your upper ...

For example, if your bust measures 37 inches, and your band size is 34, the difference will be 3. On the chart below, you'll see a 3 is equal to a C cup, meaning your bra size is 34C. No measuring ...