Ya know, both my kids are very tall for their ages. Not big, just tall. And lanky.
Since they were born, they were in the 95th+ percentiles or more, for height.
They are now, 6 and 10 years old.
My son is 6, and is the tallest in his classroom. But per grade level, there are a few taller kids. But they are 7 year old first graders. Versus, my son is a 6 year old first grader.
My daughter is 10, and in her grade level, the kids overall are just tall. Some are 11 years old, though.
At no time, has it ever been a problem.
Since my kids were born, I have always gotten the "wow, he/she's tall for her age!" And I don't care. So what.
Yah, I know they are tall. So what.
And sure, many times, people/strangers, thought my kids were older than they really are... due to their height. So what.
Just recently, my son's tennis Coach, THOUGHT my son was 8 years old! When my son said he was 6.... and my Husband repeated that he is 6.... all the kids and their parents, were SOOOOOOO surprised! They all thought he was older. But he is only 6 and is the youngest one in the tennis group. So what.
Maybe a few times, I got a questioning or stink eye, from strangers. When I then clarified my son's age to them... they said "OH! I thought he was older!"
So what.