I personally think this would look BOMB using large safety pins instead of rectangle studs.
Lay your dress or shirt out flat and draw the pattern you're going to stud in sewing chalk. if you want to make sure it's exact on each side make the chalk extra thick on one side, fold your piece of clothing in half, and press down so the chalk transfers to the other side. simple, right?
Grabrab your studs and some needle nose pliers and stud down the line. if you want the studs to have the exact same spacing (which you should) then use a sewers measuring tape to mark off your spacing.
After you've studded, then go back through and use either rectangular studs or safety pins to mimic the look the dress has below :)
Can be found at axparis.co.uk.