CathInfo.com

Those examples are not fashions that were prevalent at the time of "Padre Pio", who was absurdly name-dropped, without any substantiation.  I could go on forever about using Padre Pio as some "rule of faith", since not only has there never been more apocryphal material and "sayings" attributed to anyone in history more than to Padre Pio, but we go by what the Church holds and not Padre Pio.  Padre Pio had his reasons, and there were points he was making, sometimes under God's inspiration, but at other times based on his own judgment.

So, given that Padre Pio was a sensational character due to the preternatural phenomena associated with him 

“By Padre Pio’s explicit wish, women must enter the confessional wearing skirts at least 8 inches below the knee….” If those whom he refused asked why he treated them in this manner, he would answer: “Don’t you know what pain it costs me to shut the door on anyone? The Lord has forced me to do so. I do not call anyone, nor do I refuse anyone either. There is someone else who calls and refuses them. I am His useless tool⁹.”

It's not so simple today in the re-paganized world. 
I did not grow up as a traditional Catholic.  We wore tube-tops, cut off jean shorts, two piece bathing suits, the modern day attire.
In my late twenties, by the grace of God, I was converted to the traditional Catholic faith.  Actually, the first traditional Mass I attended with my sister I wore blue jeans and a "shop till you drop" sweat shirt.  Bishop Williamson happened to be there that day.  We were both so excited because this was the Mass that we only ever read about in the lives of the saints.
Coming from the world, we had no idea of modest dress.  Of course I saw what people were wearing to Mass and I started to dress in longer skirts for Sunday but did not know there was some standard for everyday.  It took about 10 years before I decided not to wear pants anymore but most Catholic women wear pants during the week.  Those two pictures Ladislaus posted are far more modest than most people wear today.  Of course, in the days of Christendom that would have been totally unacceptable but we have reverted back to paganism and have to pull society back to Christ and His standards.