Are you referring to the type of glamour, gear, hairstyle etcetera that a person's character is currently wearing? For the most part you can examine someone see what gear they have on and the current glamour it has on it if applicable. I'd say the only thing they would have to tell you would be probably the hairstyle that they currently have on. This of course it only apply if you are able to examine them within the game however seeing them on the lodestone I think you can still view the gear such though if I'm right.

But as the poster above me said for specific details on character height and so forth you would need to ask them but I think most would just give you the information for free I could be wrong though.