I was 21 inches at birth. But I go to 5ft., 3 in. when I had puberty at 13 and that was it.

There's no extreme height in my family, tho - you know, those 6ft, 4in.+ types.
My niece was 2ft. at birth, though. Man, she was SO long. The poor soul wasn't even pink anymore when she was born! My sis had to have a C-section b/c Emily was 10lbs., 5 oz., too, and my sis is just 5ft., 1in.
Em would scrunch up for ages until she realised she was free to be her giant self, which she has been ever since. Her dad's sister is even taller than her own husband - she's 6ft., 1 in. and played volleyball for the Air Force Academy where she went to college! My BIL's mom is 6ft., 1in, too and his dad was 6ft., 5in., just like him.
Being tall is cool, but BIL says it can be a drag once you're over about 6ft., 2 in. and standard stuff doesn't suit you anymore - like cars, movie theater seats, airplane seats, clothes, shoes, etc. He had to really mind his head when he was visiting historic sites here and in the Eastern US, too.