Part of the problem (which has been often discussed before!) is that the default Poser human figures often don't agree with the default unit conversions.  Most of them are much taller than their proportions would indicate. 

The P6 Jessi and James were especially bad; if you set the Preferences to any of the real-world units, you'll find that Jessi is tall enough to play men's basketball, and James is too tall to fit through most standard doorways. 

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