I downloaded the 'Convenience Store' pdf out of their Craftown section, and am in the process of blowing it up to 3 3/4" scale. So far, the 4-page project scales up to 17 pages, plus the roof which I'm going to guess is 4 more. (2 pages per wall, 9 pages for the parking lot.)
Still, it's very cute.
The scale conversion I'm using is based on the measurement of the clerks in the PDF. Teh clerk measures 1.38", while my Dusty custom measures 3.80" on the same ruler. A 25th Cobra with beret (don't ask) measures in at 4.12" on that ruler also; the ratio works out to 275% for my new sculpts, and ~300% for 25ths -- mind, this is just for Craftown. The buildings of the world are likely to be of even greater scale, so dio work with these will likely be limited to shots where you can skew perspective in your favor.