The Small Cuts site has an article on The Viability of 1:43 Toy Cars in 28mm Gaming In it, he compares toy cars of the matchbox variety to various 28mm figures. The Butt Width measurement section is hilarious.
The Blue Mule website has a pictorial record of some of the early figures in fantasy gaming. I’m showing my age, but I remember a lot of these figures from when I was in high school and college.
David Ferris provides the answer to one of the most-asked questions in miniature wargaming: What plastic figure scale should I use with my 25mm wargames figures?
S Scale is the railroad scale that most nearly approximates the 25mm – 28mm figure scale. Unfortunately, until recently it has been rather obscure, difficult to find at even the best stocked hobby store. This website has a vast list of S scale resources.