Chris: the van is 140 mm long, 70 wide and 85 high. That's 5 1/2 inches by 2 1/2 by 3 1/2.
I like how it feels in my hand and it reminds me of the feel of the goods van in my Hornby clockwork model railway set. I got this set when I was 5 years old and my hand was much smaller then, so I assume the Hornby goods van was smaller too.
Before making this I started making the same van body in 1:35 scale, but it was a bit fiddly to glue together and apply the details. And it didn't feel so good in my hand.
My old Hornby clockwork set was 0 scale I think, around 1:48 scale. The wagons and locomotives were all 2 axle, so it actually represented what I would now call a small industrial railway. Within a few years of getting it I was seduced into changing this for a Hornby dublo set, around 1:75 scale. This was electric and the models were mainline - complex locomotives and coaches with bogies. These didn't hold my interest the same. And now, many years later, I'm back modelling small industrial railways.