1:43 scale is a popular size for diecast vehicles. It matches the size of O scale trains in the UK. It doesn’t match the size of US O scale trains. But how big is 1:43 scale? And should you care about the difference?
A 1:43 vehicle is about 4.5 inches long, which is about 10% oversize compared to 1:48. You’ll notice the difference if the two are side by side, but there are ways to compensate for the difference too.










