Im not totally sure but when DD started her big growth spurt her hands and feet seemed to grow disproportionately to her height. Like, she grew five inches in a year but went from a size 3 shoe to a 6.5. Her hands are bigger than mine and she wears the same size shoe and she is four inches shorter than I am (she is 11), and I suspect she will be taller than I am (I’m 5’2).