Seeing Zhang Ziyu towering over her classmates at the Cultural East Road Primary School, in Jinan, China, it’s hard to believe that they are all in the sixth grade. The 11-year-old already measures 6ft 7in (210 cm), and many believe she is the tallest girl in the world.
Zhang’s parents are both former professional basketball players, and they are both over 2 meters tall, so it’s pretty clear that genetics played an important role in her physical development, but reaching 210 cm by age 11 is still very unusual. Zhang has always been taller than all the other children, and one of her colleagues remembers that in the first grade, she already stood at 1.6m (5ft 3in) tall. That’s already considerably taller than the average Chinese sixth-grade girl (4ft 6in or 1.38m).
