A (HO scale) 25 ft long logging car for HOn30 model railroad (9mm gauge).
Scale width over bolsters is 7.5 ft.
This version has space in the underside of the body for some weight.
To complete the model you will need some trucks (also available from me) and wheels, a pair of Microtrains 1015 couplers, a handbrake wheel mounted on some brass wire (around 0.4mm diameter). Logs are optional!