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What does a Scotsman have under his kilt? A lot more than you might think.

Doctors say our blokes are among the biggest in the world when it comes to penis size.

Only the French come out in front, so to speak, when Scots are compared with other men from around the world.

The research was done by doctors from the Western General Hospital in Edinburgh and St John's Hospital in Livingston.

They wanted to reassure patients who were anxious they didn't measure up in the bedroom.

The docs measured 609 men in their clinics after stretching their penises "as far as would be comfortable".

They found the average length was 14.3cm.

They then compared that with studies done in other countries and found the Scots came second only to the French at an average of 16.7cm.

The English lagged behind at 13cm and men from the US, Italy, Germany, India and a host of other nations just didn't measure up. Urologist Dr Shahid Khan, writing about the study in the British Journal of Urology International, said: "A man's self-esteem can be greatly affected by the perception of his own penile size."

Dr Cynthia McVey, head of psychology at Glasgow Caledonian University, said: "I don't know if size matters, but if it affects a man's confidence it could affect his performance."