[Giovanna Clairval]

John Varley, who is a physicist, described winged humans with great precision in the series Titan (book 3, I think).
They are tiny, about fifty-centimetre tall (!) and have eight-metre-long wings (each wing, now you see the span).

You could reduce the size of everything in your world.

The only way of wearing a shirt when you've got wings is to tightly fold your wings against your back.
Each time that you fly, you strip!

Or else the sheer strength of the unfolding wings tears the shirt apart, which would be inconvenient... but dramatic.

I hope this helps you.