The longest fingernails on a pair of male hands belonged to Melvin Boothe (USA) whose nails had a combined length of 9.85 m (32 ft 3.8 in), when measured in Troy, Michigan, USA on 30 May 2009. Unfortunately, Melvin passed away in December 2009.
http://www.guinnessworldrecords.com/longest-fingernails-(male)-ever/
