Surely trees can be any size... They grow to all shapes and sizes in reality.
I use all manner of sizes, different heights from 20mm right up to 300mm, plus loads of different shaps for 20mm.
After all real trees grow in various sizes...
Thanks. I did some working out based on a scale of 20mm = 3/4 inch (approx.) and can see that those Bachmann trees are about 4 or 5 times the height of a 20mm figure. That seems workable to me, without them being so tall that they dominate the scene.
Cheers for your input. I think I will consider 3-4 inches as good enough for my table . 12 inches (300mm) would be way too tall for me - even though I'm sure there are trees that tall just by looking out of my window.