I really, really hope that Jeph has maquettes of his characters, or at least notes and things about their exact proportions and sizes that he can refer back to, because it's crazy trying to figure out what size Bubbles is.
In her earliest appearances she was relatively constant at about seven-feet-nine-inches. I mean - seriously, she needed a noticeably overscale chair for just normal sitting down, Faye's eyes were about even with the spot where a human would have a belly-button, and she was noticeably taller than most doorways but not quite as tall as most ceilings. Her shoulders were in proportion, and in particularly narrow doors she'd have needed to turn sideways.
But it's never been really consistent. Her size has always bumped up and down with convenience for panel compositions, and lately she seems to be well under seven feet tall. She goes through doorways without ducking or turning sideways, her size doesn't physically inconvenience her anymore, and "Bubbles' Chair" doesn't really have a reason to exist because she'd fit just fine in normal furniture.
It seems like the most obvious physical reasons for her feelings of "other-ness" have been taken away along with her exaggerated perceptions of it; Instead of coming to terms with her size etc in a meaningful sense, it's simply going away.
As someone who's excessively tall/large myself, I find this a bit disappointing; coming to terms with my physical size often scaring people and driving them away was a very important thing for me, and learning that people could get past that initial fear was an important part of convincing me that it was even worth trying to be someone who participates in social living with others. I had sort of thought/hoped that it would be an important part of Bubbles' arc.
I guess for story purposes I could accept that she lost most of her bulk, and height, with her armor; but if she had lost over a foot of height and six inches of shoulder width all at once, the fact that it's passing unnoticed in-strip would be bizarre. But having it happen gradually, while the armor was still on, feels like being cheated of ... I dunno, acknowledgement or something ... about the way we humans have no real choice about our size and just have to learn to deal with it.