Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

Hi all, I have come across a tiny Weeden no7 made from 1890-1907. I am really pleased with the condition and it only has 1 screw missing but it's supper tiny. I'll add a photo, any idea of the size? I'm going to measure a piece of wire tomorrow but I thought someone may know tiny sizes better then I do.