The taller you are, the larger your face, shoulders, hands, and feet and the deeper your voice, the more male gender cues you will emit, no matter how well you look or carry yourself. But not everyone will read them. People have differing levels of gender radar sensitivity, independent of how well you present.
Also, my SO and I have noticed that she passes better when I am not around. People make subconscious comparisons when they see us together. This is why I do my best to wear higher heels when we are together dressed, while she keeps to 2" heels, so at least we are close to the same height.
As the others have said, the importance is how you are accepted and treated while dressed. Say you begin to go to a coffee shop regularly and you befriend another regular patron. Once you begin to talk at length, it is likely you will be read, unless you have a small stature and you've perfected your voice pitch. But if the person you've befriended accepts that you are feminine and not a guy in a dress, then you've been successful in your presentation?
