Height Charts
(this is for their mewtwo forms btw, if you want me to put information about their human forms I can also do that)
Main continuity guys compared to a door (and the average person). Sapphire has to duck to get through a door and Yutsi is just unreasonably massive xD
Switch AU! Now CC's the tall one :)
Couple of miscellaneous AUs; the Liberators' leader is pretty tall, but still much shorter than Sapphire; and Mega Mewtwo R is, well, BIG.
Sunder AU! Both Cosmo and Roxo get bigger when they use Creator's Fury and Destroyer's Fury respectively.
Babytwo AU! Although I guess you've only met Corundum... well anyway, here they are!
Fade is average (Mewtwo) height because I'm average height; Rose Quartz is the same size as her twin, and Null is again unreasonably massive thanks to PokéWTrainer being 23 feet tall XD (I'm not making a 20-foot-tall Mewtwo, cool as that would be).