Kim is showcasing her massive, 40,000-square-foot office space ... and gotta say ... it's pretty damn awesome.

The bells and whistles are impressive ... a massive kitchen, amphitheater, model glam room and private glam room, and on and on.

Kim didn't cheap out with decorators and designers ... Tommy Clements and Waldo Fernandez did the decor while Michele Lamy and Rick Owens designed the furniture.

Check out the glam room filled with robes, chairs for models and other stuff used for tailoring clothes.

Kim also gave a peek into her photo studio ... pretty cool. As for why she has a "private" glam room, she says it's where she kicks back and watches TV ... not a cord-cutter we guess.

Then there's the luxury shower with a chair inside so Kim's publicist Tracy Romulus can talk business with her while she washes down.