The oval is 4 x R670 curved and 2 x L10mm straight with feed point and it measures 10 x 5 inches approximately.
Lajos Thek R4-11-8 with a few car
Marklin 0-6-0 dressed up to be a Porter 0-6-0 in Nn3znc pulling z few Japanese narrow N scale narrow gauge cars
cheers Garth