Writers tend to be of two minds when it comes to describing a character’s physical appearance. Either they like to a) introduce each character with a fully-fleshed description that gives the reader an instant picture in their mind, or b) sprinkle in details sparingly, when they come up organically in the story.
(Of course, there are some writers who prefer a third option, c) divulge nothing about the characters save, basically, their names. This tactic, I DO NOT recommend. The idea behind it is, I guess, noble: to let your readers form their own interpretation of a character’s physicality free from the author’s influence, and to avoid bogging down the prose with a clunky descriptive paragraph. I can see what these writers are trying to do, only most of the time … they don’t do it. They end up creating faceless blobs: featureless talking heads that leave little impression on the reader.)
So, when it comes to describing characters, how much detail is too much? Should we saturate our pages with description, or sprinkle them?