I'm not so sure Jak, Novel implies that the height extension is much higher, but never specified how much.
Manga is the most dwarf, adding at best 30 cm. That's if the feet can go horizontal instead of being pointy downward
Not so sure if this accurate but.... I made it with some freedom
Ichika: 168 cm
Madoka: 160 cm
Houki: 162 cm
Cecilia: 158 cm
Rin: 150 cm
Charles: 154 cm
Laura: 146 cm