Wagon body is true 1:87 scale and the model can be nicely upgraded by replacing the ugly out-of-scale bogies with Evemodel K6 spare parts and by installing Kadee or Bachmann couplers
The body of the passenger cars is not 1:87 scale (HO) as mentioned but likely 1:76 scale (00) whereas the freight wagons of the same collection are true 1:87 scale.