Well another lil known fact for you then. The generator looking pieces on her armor (in hips) in ascension 1 (Tam Lin armor), are actually circulators that plug into the black flight-suit looking attire beneath her armor (when her armor glows). The "generators", in actual fact, are life support systems that circulate the murky bog water from the lake she was born in, something she's forced to do "constantly" according to the lorebook, otherwise her body will decay, rot, and presumably lead to death or returning to mud. Which just goes to show how fragile her existence truly was given she was on constant life support, forced to circulate it through her body constantly, and her dragon form has to literally wear a harness and wires to holds its decaying body together, even ignoring her reliance on being loved and the draconification. This information is presented in both CHOCO's doujin, as well as the official FGO Material 13 book. A book I'd recommend for any Meluko fan given there's quite a bit of interesting info and personal inflection in there, much moreso than most of characters. Meluko is truly a staggeringly detailed and nuanced character for the amount of screentime she actually had, she's the best.
She probably is 1-2km being real. When I said height is hundreds of meters, I meant vertical height, and only a relative portion of it, and as a bare minimum as well.
If you compare her ribcage in LB6 and various official art, relative to the lake and to that new image (in which her chest is only a very small portion of hits total height), you get a massive size that can easily exceed a few kilometer (total). Also thinking on it, given Albion's carcass became the land and the very lake itself, which when compared to Fae Britain as a whole in the various background CGs, map, and various other stated distances between landmarks, you get a few kilometers as well. So really, in the end Albion absolutely is massive on all fronts. Not 100s of km massive, but most ways to get an idea of its size all hover around hundreds of meters for specific portions like the ribs, and kilometers in length, maybe even a kilometer or few tall.
If I recall, it's not stated to be 80km long, but rather that Albion managed to dig 80km down toward the planet's center. Albion itself instead was stated to be "as big as a mountain" with "claws as big as towers", so likely a few hundred meters tall, and hundreds to thousands of meters long, which lines up with its ribcage as seen in LB6 given the size of it shown in this picture. As well as the tomb of Albion and its skull.
I was so excited until I realized main visual Servants never get CEs that year or audio lines at the Fes and now I'm clinically depressed and distraught.
It ain't fair bros... I just want to hear her voice, I'll trade the visuals over that any day...
#FGO#メリュジーヌ