Slightly Norse John
Mongoose
Star Wars Technical Commentaries lists seventeen including those from the EU, mainly the comics where there's some sort of visual available.
The Executor and her sister ships, and everything roughly in the same size class, Dr. Saxton lists as battleships.
We have the Victory- class, light destroyers at 0.9 km with some atmospheric capability and a Falcon-cockpit-writ-large on their bridge tower, Vic-I has twin main engines, Vic-II has triple, both have wing wedges. Vic-I is primarily a missile armed fleet support ship, Vic-II a turbolaser armed light hunter. Both have small fighter complements.
Anonymous type 1 (never referred to by name, but possibly Vic-III) is the same length, same bridge tower, but has no wing wedges and no hangar. Fast light destroyer, fleet outrider perhaps.
Harrow is the same length as a Victory, with the wing wedges, but has a KDY style bridge tower and a much larger, probably full wing, fighter bay. Possibly a KDY rebuild of a Victory.
Anya Karu was seen only once, 1km long, no undersurface details, but a small KDY tower. Light destroyer.
Anonymous type 2 is a 1.2 kilometre late KDY design, with a neckless bridge tower embedded directly in the superstructure, no secondary engines, no fighter bay- a fast, light destroyer, pure combat type, possibly based on the Venator hull.
Speaking of which, the Venator is 1.137km, and as much carrier as warship- some heavy weapons, but mainly a space control and land attack multirole.
Republic class have their design ancestry in the Victory, but seem to be 1.25km long and looking as Mon Cal as they do Star Destroyer.
Anonymous type 4 is a probable dedicated carrier conversion of the Imperator class, same length and upper works, smaller reactor bulb and thrusters, larger fighter bay.
Imperator- class star destroyers (as Dr. Saxton points out, they're all Imperial. Calling something Imperial class is like referring to the Jefferson as an American-class carrier.)- there are at least two types. It is the standard class because of it's speed and adaptability; with large troop and fighter complements, it can be sent anywhere in a hurry to do anything. The Imperator-I has triple paddle thrust deflectors round the main engines, the Imperator-II has ring shaped deflectors, the Imperator-I has twin main gun turrets, the Imperator-II octuple.
Anonymous type V was seen on film in ROtJ; probably a development of the Imperator class refined for a pure ship to ship role, it has no bays, a shielded reactor bulb, and apparently thicker armour- it may also be slightly longer.
Dominator is the known name of the Interdictor variant of the Imperator-II; there is also an Unnamed Interdictor Type which appears to be based on Imperator-I hulls.
Anonymous type III was seen in the distance over Byss, from scaling clues from the tower it is slightly over 2km long making it a heavy destroyer. Possibly a 'mini-super'; complicated underside, double thruster bank or large bays, unusual mid mounted bridge.
Allegiance class- 2.2km long, heavy destroyer or possibly light cruiser, tower embedded in the dorsal superstructure again, Imperator like thruster layout but much larger reactor bulb and minimal to no bays; appears to have been designed as battlewagon close support.
Shockwave; poorly described in one of the novels, possibly a light cruiser, at least a very heavy destroyer, 2.2 to 2.4km
Anonymous VI; seen in company with VII under Ysanne Isard, 1.2 to 1.3km long, with a narrow hull, and an upper surface hump- either a protruding reactor bulb, making it an ultrafast type, or an interdictor unit.
Anonymous VII: 1.9km long, heavy destroyer- carrier; large docking bays and a double reactor bulb, strike flagship.
All of these are to greater or lesser degree canon, and counters for this lot are going to be really easy to tell apart. Joy.
The Executor and her sister ships, and everything roughly in the same size class, Dr. Saxton lists as battleships.
We have the Victory- class, light destroyers at 0.9 km with some atmospheric capability and a Falcon-cockpit-writ-large on their bridge tower, Vic-I has twin main engines, Vic-II has triple, both have wing wedges. Vic-I is primarily a missile armed fleet support ship, Vic-II a turbolaser armed light hunter. Both have small fighter complements.
Anonymous type 1 (never referred to by name, but possibly Vic-III) is the same length, same bridge tower, but has no wing wedges and no hangar. Fast light destroyer, fleet outrider perhaps.
Harrow is the same length as a Victory, with the wing wedges, but has a KDY style bridge tower and a much larger, probably full wing, fighter bay. Possibly a KDY rebuild of a Victory.
Anya Karu was seen only once, 1km long, no undersurface details, but a small KDY tower. Light destroyer.
Anonymous type 2 is a 1.2 kilometre late KDY design, with a neckless bridge tower embedded directly in the superstructure, no secondary engines, no fighter bay- a fast, light destroyer, pure combat type, possibly based on the Venator hull.
Speaking of which, the Venator is 1.137km, and as much carrier as warship- some heavy weapons, but mainly a space control and land attack multirole.
Republic class have their design ancestry in the Victory, but seem to be 1.25km long and looking as Mon Cal as they do Star Destroyer.
Anonymous type 4 is a probable dedicated carrier conversion of the Imperator class, same length and upper works, smaller reactor bulb and thrusters, larger fighter bay.
Imperator- class star destroyers (as Dr. Saxton points out, they're all Imperial. Calling something Imperial class is like referring to the Jefferson as an American-class carrier.)- there are at least two types. It is the standard class because of it's speed and adaptability; with large troop and fighter complements, it can be sent anywhere in a hurry to do anything. The Imperator-I has triple paddle thrust deflectors round the main engines, the Imperator-II has ring shaped deflectors, the Imperator-I has twin main gun turrets, the Imperator-II octuple.
Anonymous type V was seen on film in ROtJ; probably a development of the Imperator class refined for a pure ship to ship role, it has no bays, a shielded reactor bulb, and apparently thicker armour- it may also be slightly longer.
Dominator is the known name of the Interdictor variant of the Imperator-II; there is also an Unnamed Interdictor Type which appears to be based on Imperator-I hulls.
Anonymous type III was seen in the distance over Byss, from scaling clues from the tower it is slightly over 2km long making it a heavy destroyer. Possibly a 'mini-super'; complicated underside, double thruster bank or large bays, unusual mid mounted bridge.
Allegiance class- 2.2km long, heavy destroyer or possibly light cruiser, tower embedded in the dorsal superstructure again, Imperator like thruster layout but much larger reactor bulb and minimal to no bays; appears to have been designed as battlewagon close support.
Shockwave; poorly described in one of the novels, possibly a light cruiser, at least a very heavy destroyer, 2.2 to 2.4km
Anonymous VI; seen in company with VII under Ysanne Isard, 1.2 to 1.3km long, with a narrow hull, and an upper surface hump- either a protruding reactor bulb, making it an ultrafast type, or an interdictor unit.
Anonymous VII: 1.9km long, heavy destroyer- carrier; large docking bays and a double reactor bulb, strike flagship.
All of these are to greater or lesser degree canon, and counters for this lot are going to be really easy to tell apart. Joy.