Tall is such a relative term.
Gil-Galad, I'm ready to concede that you're taller than *most* other people on the Downs. But to me, you're not tall.
My father
and my middle younger brother are both 6'
8". When people say someone is tall, perhaps he is - to them. To me, someone needs to be at least 6'6" for me to recognize that he's tall. There's a guy I've known for 3 years, and he's 6'5", I think. It never occurred to me that he was tall - I just felt normal around him! He was the size I am used to. My father was the first man I ever knew (obviously), and for a very long time the tallest I'd ever seen. When you see 6'8" as normal, what does that make the rest of the world??
But, for the sake of most other people, I'm ready to admit that you're tall. But I also hasten to defend
Neurion. I don't know how tall he is. But I'm certainly not going to assume that 6'4" is the Downs' upper limit!
Incidentally, my oldest younger brother is roughly 6'2" - 6'3". My youngest younger brother is nearly 6' (we haven't measured in a while), and he's younger than you. It's a big question to see if he'll beat the oldest or not.
To stay on-topic: I see
Neurion as his avatar, one of the Lorien Elves, and particularly since he's agreed he's tall. So, that makes him a good 6'6" or more, with a slim, strong build. Blond hair (but not long - I can't stand that), grey eyes, "aristocratic features." But he's a teenage boy, say 15, and although he looks like an Elf, he's full of mischief and chain-pulling.