1:43 scale is a very popular scale for diecast cars. All my DeAgostini and Eaglemoss models are this scale, as are some Corgi, Solido and Soviet Made cars.
A 1:43 scale car is roughly 4 inches long. This 1907 Peugeot scaled at 1:43. Made by Lesney Products in London, England. This model- 5Y – was made in 1969 based on dimensions of a car in the “Bonnal Renaulac Museum” in France. This model is 3.5 inches long or 89 mm.
1:43 is a popular scale for makers of dioramas (I haven’t ventured down that road yet).
Some of my 1:43 models: