Deuteronomy 22:5
The woman shall not wear that which pertaineth unto a man, neither shall a man put on a woman's garment: for all that do so are abomination unto the LORD thy God.
The people I fellowship with interpret this as saying, "A woman should not wear the clothes of a man and likewise a man should not wear a woman's garment." Many people will interpret is differently though. From classes that I have studied in, the difference between the garments were simply the division between the legs of the fabric. Meaning a man's garment was divided and the woman's was not. I'm sure many things are taught though and we will never really know till we get to Heaven what the Lord meant by all the Scriptures.
On a personal note: I'm 25 years old and have been saved since 2001. With conversion there was a conviction that I should wear what I thought would pleasing to the Lord. Skirts and dresses only!!! I do not wear anything form-fitting to purposefully attract the eye of another man and all my garments go to my ankles. With the wearing of pants, I feel that is showing the form of something that is only to be seen by my husband.
That is my opinion only. I do not force it on anyone, but I love to tell people how the Lord changed me and transformed me from a "junkie" into a god-fearing young woman.
Don't ever change how you are based on what "man" tells you. Always let the Lord change you from within.