Not sure I understand what your asking here. The proper size for the default Poser figures is the size they have when they load in Poser, or any other application for that matter. If your talking about a conversion factor between Poser and some other application that depends on what the other application is. A Poser box prop is 0.1 cubic Poser units so if you import a box prop into another application you have a mesure of 0.1 Poser units in that application. A Poser box scaled to 1000% measures one Poser unit along each side so if you exported that from Poser, and then imported it into another application you would have a measure of one Poser unit. A Poser box prop scaled to 0.125 is generally taken to be equivalant to one real world cubic foot, so if you export that and import it into another app you have a measure of one foot. You can of course do the reverse and export a prop of a known size from another application, then import it into Poser. For instance if you export somthing that LightWave thinks is one foot tall, then import it into Poser, you can rescale it untill it is the same hight as a Poser box prop scaled to 0.125. Whatever amount you had to scale this LightWave prop should be the same amount you have to scale any LightWave prop.