8-10 metres
Klan Klein from Macross Frontier is a Zentradi micronized to human size, with a height around 152 cm (5 feet). In her full Zentradi form, she would be much taller, typically around 13-15 meters (43-49 feet).
Well it's kind of tricky that question because in the anime Alto certainly does tell Klein Klan that he likes Ranka more than Sheryl and confesses as well that he loves her to Klein Klan. (of course Sheryl was listening at the time) But in the end of the anime Alto doesn't pick either of the girls Ranka or Sheryl, he infact ends up choosing the "Sky" as his choice. In the manga i think it's different? I unfortuntely don't know about the manga - if and i hope it's Ranka he goes with but I'm not quite sure.
Rune Klan is 6'.
Allen Klein is 5' 6".
Brendan Klein is 5' 11".
Christine Klein is 169 cm.
Crystal Klein is 5' 7".
Derek Klein is 5' 10".
Fox Klein is 6' 1".
Fritz Klein is 6' 3".
Jasmine Klein is 5' 4".
Kari Klein is 5' 9".
Karli Klein is 5' 2".