Railway modelling S-gauge size has only one direct match across the model hobbies ranges, and that is for the 1:64 “micro” Scalextric slot car racing system.
S-gauge roughly matches the modern 28mm (1:66) trend of oversized 25mm wargaming figures, and in these scales, the size mismatch is less noticeable than in the smaller scales.
The model availability support, from the railway models industry, appears to be less than it is from the wargames industry – particularly in the “ancient and medieval” buildings lines.
Railway modellers should consider sourcing their buildings and other scenic structures from the wargames trade. Particularly with the manufacturers of these items, there is a trended migration to 28mm from 25mm, and the buildings in the wargames hobby are often designed to be vertically over-scale for the figures they are to be used with. This will bump them a scale-slice to fit with S-gauge railway model sizes.
One model segment where the switch between rail and wargames ranges fits especially well, is in the bridges and similar models. 20th Century wargaming often borrows modern structures from the railway model hobby, and for the rail modellers, the offerings for non-rail, and non- steel, bridges within the wargames supplies industry is very broad. There are excellent producers of stone, or brick, bridge structures, with good selections of styles, and I have seen several layouts where resin wargaming bridges have been used as the track carriers over culverts and streams.
(page incomplete – more to follow