Victoria is 178cm tall or 5'10-1/4" the door was modeled at 838x1981x44mm in Hexagon.

The Blue door is correctly sized at 1981mm tall. The Orange door is only 1844mm tall rather short for a door, (unless you live in a medieval castle.)

Both doors were exported from the same base model. The Blue door was exported with a scale factor of .4101 and the units of meters and the Orange Door was Exported with a scale factor of .3815 and Meters for units. Both were imported into Poser with Centered and Place on floor checked everything else unchecked.

The two door were then Exported from Poser 10 and the Scene saved as a PZ3 file and Exported as a DXF.

The doors were then imported back to Hexagon and remained the same size, thus proving I can round trip the door and maintain the dimensional integrity of the Measurements, important if you are going to create morphs.

The Scene was opened in Daz Studio and the doors remained the same size.

In Carrara they were the same Size. When the Exported DXF was opened in Turbo CAD they were the same Size.

One other point, Victoria 4 is 178cm in Hexagon, Carrara, Daz Studio and Turbo CAD.

The same door modeled in Blender, exported with a Scale Factor of 2.0505, was the same size as the Blue door.

I would consider the Blue door to be in the Proper Scale, to match all the figures including Poser Andy.

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I have given you all of this so you can double check my findings. You will need Fire Angle's Poser height measuring rulers.