If she's already ~ 5'6" at 13, she will likely be more in the 5'9" or taller range. That doesn't preclude her from being a great skater, though - look at Lisa Marie Allen who was 5'8" or 5'9" and top 5 in the World (and only so low because of Linda F). It would be UNUSUAL for a female skater to be that tall, but not impossible!