The units you use in Poser are just the way the value is displayed on your screen. In your scene file, and in any material definitions you save, it is stored in inches.

When somebody else uses your material, it also uses inches. But Poser displays it in whatever display units they are using.

X-post... what Laurie said!

"If I were a shadow, I know I wouldn't like to be half of what I should be."
Mr Otsuka, the old black tomcat in Kafka on the Shore (Haruki Murakami)