✝ a long lace dress (here's mine)
✝ tape measure
✝ four straight pins
$30 for the dress
This is the easiest...
First, put the dress on and mark with pins the length you want in the front, back and on the sides. I measured 12 inches in front and back and 24 inches on the sides (up from the seam). I have to admit the sides are just a tiny bit higher than I wanted, so I advise you to make it a little longer to be on the safe side.
Feel free to wear something less slutty underneath...or more.