I’ve updated the approximates sizes/scales for some basic and alternate units. Keep in mind that many classes of ship and aircraft, though in the same class, varied in size so my sizes will be off on some units. If your like me I want to be able to visually distinguish between units quickly so keeping classes similar in size I find works the best. Below is my guide/attempt to standardize my pieces where they are relatively the same size for their respective class. I’ve added some alternative classes that I use in my games and ties in some of the alternate pieces that HBG is putting out. If you need something scaled and not sure how to do it let me know and I’ll do my best to help.
Carrier 6.5 cm 1/3700
Light/Escort Carrier 5cm 1/3100
Battleship 6 cm 1/4000
Cruiser 5.5 cm 1/3700
Light Cruiser 5 cm 1/3400
Destroyer 4.8 cm 1/2400
(cm is for the wingspan)
Heavy Bomber 4.7 cm 1/700
Medium Bomber 3.5 cm 1/600
Light Bomber 1.7 cm 1/600
Heavy Fighter (Twin engine) 2.8 cm 1/600
Fighter 2.2 cm 1/500
Light Fighter 1.7 cm 1/600
Dive/Torpedo Bomber 3 cm 1/500