Rumeysa Gelgi's phenomenal height is due to a condition called Weaver syndrome, which causes accelerated growth and other abnormalities, Guinness World Records said in a statement.
Gelgi was re-measured this year after being named the world's tallest living female teenager in 2014, at the age of 18.
Due to her condition, Gelgi usually moves around in a wheelchair, but she is able to use a walker for short periods.
Gelgi is keen to use her platform to inform people about rare medical conditions like Weaver.
"Every disadvantage can be turned into an advantage for yourself so accept yourself for who you are, be aware of your potential and do your best," she said in the statement.
Her height intrigues people when they see her, but most people are kind and supportive, Gelgi told Guinness World Records.