[quote=@Asuras]
Added some stuff to make his suit more unique, and described his fighting style and semblance in more detail.

<Snipped quote by Silvan Haven>

Good question. Given its size, I'd say it can be compacted (what with how crazy unfolding/folding mechanisms can be in RWBY) into a smaller size roughly the size of two helmets, but not much smaller. He could carry it in a backpack (which would take up most of the space) though given any indication of needing to go on a mission, he'd probably just put it on beforehand and wear it throughout.
[/quote]

You could also go with a belt that has a bun of "pouches" on it. I think physics can be RWBY fudged enough to fit a folding suit of armor like that.