I can't just ignore the fact that Rangi herself is 6ft or probably even taller. Unless Kyoshi's head and neck together is about 1ft, since she reaches the height of Kyoshi's shoulders.
Rangi interrupts Kyoshi n Yun | The Rise of Kyoshi by kkachi95 on DeviantArt
Kyoshi Carrying Rangi" Baby One-Piece for Sale by silentrebel | Redbubble
Rangi and Kyoshi | Avatar Genderbend AU by kkachi95 on DeviantArt