When I was in South Korea I had plenty of Koreans who towered over me. I'm 5'10" as well. When I was first going to Korea I expected everyone to be small. Now, when I was in Thailand I did notice that most of the guys there are small.
My grandfathers generation (him and his friends) when South Korea was dirt poor, they're all around 5'6". My fathers generation (him and his friends) when South Korea was growing economically, they're all around 5'9". My generation (me and my friends) we're all 5'10" and taller.

