On the chart below, you'll see a 3 is equal ... so you shouldn't be afraid to try additional sizes from various brands to find the bra that looks the most flattering and feels the most comfortable.

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 ...

Marks and Spencer has raided its archives to chart ... for a bra. Mrs Roche said: "Bras back then in them days were more or less the same, where as now you can choose different sizes and styles ...