For many years 'scale' has been used as a marketing tool by companies. Many Airfix kits varied in actual scale, and I have been told many HO scale building kits used to be smaller. Some current r2p buildings for OO (scale?) are smaller than 1/76 as well.
I recently bought a couple of cheap diecast vehicles at a high street store. One said 1/38 scale , possible but looks a bit bigger, and the other said 1/43, but looks same scale as the other, so I will be happy to use both on one of my 1/32 scale projects.
What I don't understadn, is that there is a market for SM32 accessories(1/19), and if this chap had said 1/19th scale then he might have as much initial interest and better feedback.
I use Faller E-train items and these are a bit small, possibly nearer to 1/24, but narrow gauge comes in all sizes, but had some return some stock I was selling , at their expense from USA, because he said it was too small. I normally put a ruler in photos so people can see size. That way it should be obbvius to everyone, but you always find someone who has not looked properly. Dolls house items(1/12) vary in size, and dolls house enthusiasts seem to be more interested in everything looking about same size, not scale.
Currently I am looking for something for one project, but too many people don't think to put size, or a ruler in photos.
Narrow gauge Francophile interested in 1m, 60cm,50cm , 40cm and smaller gauges . Build in scales from 1/6th to 1/24th. Also 1/32nd and 1/35th using 16.5mm track to represent 50cm and 60cm gauges. http://www.rue-d-etropal.com