Another possible option is to save your Product as *.3dxml file format. It will definitely be (very) lightweight. And it wouldn't even require any CAD package for your target 3rd party to view it (just need to download Dassault's player...or view it in Word or PPT).

On the surface, 3dxml seems to be specifically designed for what you want to do. I don't think that you could include any dimensions however...if that's important to you.

Hope this helps...