Mr Gruberfield: “according to that reason, women would need to wear some kind of wire frame to push their shirts away from their body so that the shirt doesn’t ‘outline’ it.
Also their sleaves would need to billow out several inches, so as not to accentuate their arms. “
Not so. The halochos of covering the upper and lower part of the body are different. Upper part must be covered, but outline need not be hidden.
Oomis: I think culottes are forbidden because of poretz geder – they are too similar to pants.