According to the American scientific magazine Healthline, the average length of a hand for a female individual is 17.27 cm (6.8 in).
This is measured from the tip of the finger to the crease under the palm.
Sadly, Rumeysa's unique stature can cause some issues: she has bespoke orthopaedical shoes made, can only walk with the aid of a walker for short periods of time, and her height causes her some health issues to this day.
Although she was homeschooled, Rumeysa also reports that she was bullied during her childhood due to her height.
Her condition doesn't make her life easy, but she says it makes her feel special.
However, she also recalls that she understood that those comments often stem from ignorance.
Therefore, ever since achieving her first record Rumeysa has taken upon herself to educate people and spread awareness on her condition, becoming an advocate for positivity, diversity and research.
"Be aware of your potential," she says.

The male counterpart for Rumeysa's record was broken by Guinness World Records' superstar and two-times Hall of Famer Sultan Kösen (Turkey).
Measuring 246.5 cm (8 ft 1 in), Sultan became the tallest man living in 2009.
Two years later he was measured again in Ankara, Turkey, and confirmed his record with a towering 251 cm (8 ft 2.8 in).
He has has hold the record ever since.
Interestingly, both Sultan and Rumeysa are from Turkey. Although they never had a chance to meet, they would like to do so in the future.
Find all about Sultan