This is an as for class uniform from West Point.  It's probably easier to list info about the guy who wore it than all the specs, since the Cadet Uniform Factory just makes everything custom.  I'm 155 lbs, 5'7" tall and my proper hat size is 7.5.  Pants are usually 30" waist with a 31" inseam and my chest is 42".  It fit - I'm a medium for most stores and things.  The rest is pretty standard.  Hat brass hasn't been polished lately, but the work that's been done on it is worth the price of the uniform if you're planning on trying to get in.  I used a dremel to smooth out the lines on the stripes to make it look like it had been polished thousands of times.  This is fairly standard advice for parents' clubs populated by folks who don't want their new cadet kids to get ripped up in Beast Barracks.