The last such ubership I ever produced was the
Azrael. While huge, the Azrael-class was not as big as the Phallus-class. It's size was, however, in the same order of magnitude as that of the Phallus-class (its length was slightly more than half the length of a Phallus-class ship). It was a lot more powerful than the Phallus-class though.
Its statistics were as follows:
==*==
Azrael-class Heavy Supercruiser
Dimensions:
Length: 30,000 miles (48,000 KM)
Beam: 8,000 miles (12,800 KM)
Depth: 3,000 miles (4,800 KM)
Propulsion:
Foldspace drive
Class III Hyperdrive
Warp drive (backup/tactical drive. No external nacelles, capable of up
to warp 6.7, or warp 7.1 for 3 hours if redlined.)
Impulse STL drive.
Power:
Each of three major systems - energy weapons, shields, and
operations/propulsion are powered by their own seperate power core.
This makes three main hypermatter-warpcores, with a fourth backup
capable of powering all three areas to a limited degree in an
emergency. A network of smaller fusion reactors also serves as backup
for general operations throughout the ship.
Defence:
Shield type: Hypershielding.
Shield strength: 10e52 J
Armor: 30 meter thick Depleted uranium plating, overlaid with 15 meter
ablative.
Offence:
1x axial hyperlaser. Capable of smacking down an (Imperium) Asgerd's
shields with one shot, this is the main weapon of the Azrael-class.
The actual diameter of the bolt delivered by this weapon is 520 miles
(832 KM), with a bolt length of 50,000 miles (80,000 KM). The range of
this weapon is 15 million miles (24 million KM)
300 Superlasers, DS-II class.
1 billion Heavy turbolaser turrets.
800 million PRXX-2 Primary Beam Projectors.
4 billion Medium turbolaser turrets.
8 billion LTL CIWS.
5 billion GRRS-2 FTL Shockwave widebeam cannon CIWS.
100 million P-1800 Anti-starship (Chernikov Drive) Missile launch
tubes.
500 million Todesfaust tubes.
Craft:
850 Wolverine-class Star Destroyers
1 million TIE/A.
Below are a number of graphical representations of the great new ship,
pride of our Republic:

==*==
Notes:
A Todesfaust is an anti-ship torpedo containing 6 tons of antimatter and 6 tons of matter.
An Asgerd is a type of vessel in use by the
Sixth Imperium, and is more or less practically invincible.
A Wolverine-class Star Destroyer is 360 meters long, but has two-thirds of the firepower of a VSD-II. Designated as pocket battlships, WSDs typically fight as part of a four-ship unit designated as a wolfpack.