This is it, the ultimate Homeworld ship size video.
00:14 - Fighters
05:08 - Corvettes
10:55 - Frigates
20:40 - Research Ships
21:36 - Resource Ships
24:19 - Destroyers
29:09 - Cruisers
35:20 - Carriers
41:45 - Shipyards
43:10 - Motherships
54:40 - Yomamaships

Frequently asked questions:

Why are the models textured mostly in grey?
Teamcolors are generated by the game on most grey areas

Are dimensions accurate?
It depends what do you mean by "accurate", all models were extracted from their respective games without modifying their size.
If you want real dimensions (as in "from the HW1 manual") for spaceships, you should multiply them by around 24, it doesn't however make any sense for fighters.

Why is the Taiidan Carrier so small here?, the wreckage on Kharak is supposed to be bigger.
Check answer above.

Why is ship X or ship Y not present in the video?
¯\(°_o)/¯

Why no cataclysm ships?
¯\(°_o)/¯

"Ship Y of franchise Z is bigger than ship X from Homeworld blablabla"
cool story bro

Why some faces are sometimes flickering?
Blender's Rendering engine doesn't like big models and I'm sorry for that

Why is the video so long?,
To allow people who have never played Homeworld to have time to admire the ships and music.

How did you extract the 3d models ?
for DoK:
   • How to extract Homeworld: Deserts of ...  

for HW:Remastered:
   • Extracting Homeworld Remastered 3D Mo...  

Do you provide the 3d models?
Yes, you can download them here:
https://goo.gl/zs8Scz


orthographic view here: http://i.imgur.com/WL9NpF6.jpg

playlist:
00:04 The Gardens Of Kadesh HW1
05:07 Into The Dust HW2
10:53 Tutorial HW1
15:16 Tombs of the Ancients Alt Mix DoK
17:48 Shadows in the Sand DoK
19:58 Sarum HW2
24:18 Into the Heart of the Galaxy HW1
28:27 The Kalash Wrecksite DoK
35:20 Heavy Radiation HW1
40:14 Sarathi Basen DoK
43:11 Kharak System HW1
51:31 Hyperspace Inhibitors HW1
52:42 The Age of S'Jet HW2