The longest leather belt measures 62 m 91 cm (206 ft 36 in) and was made by the Almpani Brothers factory in Thessaloniki, Greece, on 1 June 2008.

dimentions of the belt:
62 m 91 cm (206 ft 36 in) x 4 cm (1.58 in) x 5 mm (0.2 in)
analysis:
65% leather shavings, 25% bubber and 10% water glue