1:43 scale is an extremely popular size of die-cast model for adult collectors in Europe, Asia and the US. There are many manufacturers in this scale producing everything from customized and accurate race cars to emergency vehicles to family sedans and SUVs, including several making the comparatively large trucks and tractor trailers.

This scale is associated with O scale model trains which come in 1:43 scale (British and some European O scale) and 1:48 scale (American O scale), as well as 1:45 scale (NEM European 0 scale). It is only slightly larger than 1:50 scale, a relatively common die-cast scale. Items in all four scales are sufficiently similar in size that they are commonly used together on O layouts.