Jyoti Amge, who is 24.7 inches tall, accepted the title Friday while celebrating her 18th birthday in her hometown of Nagpur, the BBC said Saturday.
Guinness confirmed Amge measured 7 centimeters shorter than the previous record-holder, Bridgette Jordan of the United States.
"I feel grateful to be this size, after all if I weren't small and had not achieved these world records I might never have been able to visit Japan and Europe, and many other wonderful countries," Amge told the British network.
Amge has a form of dwarfism known as achondroplasia and is not expected to grow further, the BBC said.
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