The world's tallest and shortest men met for the first time to mark Guinness World Records Day and the 60th anniversary of the Guinness World Records book.

world's tallest man world's shortest man
The world's shortest man, Chandra Bahadur Dangi, greets the world's tallest man, Sultan Kosen, to mark Guinness World Records Day in London. Kosen, measuring 251cm (8 foot 3 inches), towers over Dangi who is only 54.6cm tall (1 foot 9-and-a-half inches)Luke MacGregor/Reuters

Sultan Kösen is the world's tallest man, at 246.5cm (8ft 1in) tall. The part-time farmer was the first man over 8 ft (2.43m) to be measured by Guinness World Records in over 20 years. He took the title from Xi Shun (China, b. 1951), who measured 2.361m (7ft 8.95in) in height when measured in 2005. Sultan also holds the record for largest hands on a living person, each one measuring 28.5cm (11.22in) from the wrist to the tip of the middle finger.

Chandra Dangi is the world's shortest man ever measured, at 54.6cm (21.5in). He lives in the Nepalese village of Reemkholi in Dang district. Chandra is the shortest adult human to ever have their height verified by Guinness World Records, beating Gul Mohammed (New Delhi, India, 1957-1997) who was 57 cm (22.5 in) tall.

Sultan Ksen, the worlds tallest living man, is 246.5 cm 8 ft 1 in tall. Chandra Dangi the worlds shortest man ever measured, at 54.6cm 21.5 in
Sultan Kösen, the world's tallest living man, is 246.5cm (8ft 1in) tall. Chandra Dangi the world's shortest man ever measured, at 54.6cm (21.5in)Guinness World Records
guinness world records day
Photographers crowd around Sultan Kösen and Chandra Dangi, the world's tallest and shortest men respectivelyGuinness World Records

In addition to the world's tallest and shortest men meeting, many world records attempts are being made to celebrate the 10th annual Guinness World Records Day.

IBTimesUK presents some of the strangest new Guinness world records:

guinness world records day
The greatest number of times putting one leg behind the head in 30 seconds by an individual is 30 and was achieved by Adonis Kosmadakis (Greece) at the Moulin Rouge in ParisGuinness World Records
world record day
The farthest basketball shot made backwards was 25m (82ft 2in) by Thunder Law of the Harlem Globetrotters at the US Airways Centre in Phoenix, Arizona, USAGuinness World Records
guinness world records day
The most people eating breakfast in bed is 388, achieved by Pudong Shangri-La Hotel in Shanghai, ChinaGuinness World Records
guinness world records day
The largest high heeled shoe measures 1.95m (6ft 5in) long and 1.85m (6ft 1in) tall and was created by Jill Martin and Kenneth Cole in New YorkGuinness World Records
guinness world records day
Children from Armidale High School in New South Wales are pictured attempting to set a Guinness World Record for the most people throwing flip-flops (or 'thongs' as the Australians call them) simultaneouslyGuinness World Records
guinness world records day
The most people head banging simultaneously is 320 and was set by students of Armidale High School in Australia. (The song was 'It's a long way to the top' by AC/DC)Guinness World Records
guinness world records day
The most spears caught from a spear gun underwater from 2m (6 ft 6 in) in one minute is 10 and was achieved by Anthony Kelly in the swimming pool at Sport University of New England in Armidale, AustraliaGuinness World Records
guinness world records day
The largest gathering of people dressed as penguins is 373 and was achieved by people supporting Richard House, the children's hospice, in Queen's Walk, LondonGuinness World Records
guinness world records day
The largest line dance involved 25,703 participants and was achieved by China Line Dance Sport Promotion Centre in HangzhouGuinness World Records