The nice thing about this mod is the ability to create towns of varying sizes with varying sizes of residential/commercial/industrial), but there wasn't any info that compared settings to the vanilla town sizes. My initial presumption was that you could use settings of 50, 100, 150, 200 and 250, for each town size but it doesn't translate.

I was doing a test on various setting sizes to see what settings roughly correspond to which town sizes from the vanilla town generator. Unfortunately when you get above 100, each tick on the slider jumps up by 50's, whereas below that the slider goes up by 10's, but it's not possible to build towns similar to Medium and Large because we need some intermediary values between 100 and 200. The numbers below.

Vanilla town sizes (population/shopping/jobs):
Tiny: Size 60
Small: Size 105-110
Medium: Size 150
Large: Size 220
Huge: 260

To get a Tiny town (~60), a setting of 50 will be comparable. To get a small town (~105-110), a setting of 90 will be comparable. To get a huge town (~260) a setting of 200 will be comparable.

It's not possible to create towns comparable to Medium (~150). A setting of 100 creates towns around a size of 120, whereas a setting of 150 creates towns around 195 (somewhere between a Medium and Large. There's nothing else in between.

With a range of 75 size between 100 and 150, a setting of 125 might theoretically make a town around 155 (close enough to medium). Likewise if we had a 175 that might theoretically make a town around 225.

To be honest, I could do without the insanely high values. I'd probably never use them.

To summarize, to create towns comparable to the vanilla sizes these settings should be used:
Tiny: 50
Small: 90
Medium: 125 (need to add)
Large: 175 (need to add)
Huge: 200