Rememeber that super cute chick in Fifth Element who said "Big-bata-boom"? Well after her explosion onto that 1997 movie as Leeloo every geek boy has crushed on her in Ultraviolet and Resident Evil. And now you can dress like her too-- or at least like she did in a modeling shoot.
Start by laying your mens XL t-shirt out flat.
This is the super tricky part. The way I did it was by laying out an old pair of underwear. The back of the underwear (the part that will cover your butt) is on the very bottom. You should see what appears to be an hour glass shape. From where the front of the panties are just draw/cut up tapering in slightly. (See picture if its confusing. Also be sure to leave the neck hole in tact. Cut around where the original collar was. You will need this.
Next mark where the top of your bottom is going to be and start cutting strips fromt hat point up until the collar. Pull stips as you go to give them stretch.
I don't have a picture for this step, sorry. But what you will do at this point is clean up around the collar and cut it out. You can stretch this section too as well.
If you flip the bottom of the suit over you will begin to see it take the shape of a suit. But here I ran into a snag of how to get it to fit correctly. My solution was to go to the remaining back piece of the t-shirt and cut out a long strip to use as a draw string.
Using a safety pin run the draw string through the hem of the t-shirt that is already there.
Then using a needle and thread or your machine sew a tie string to the front of your suit so you can tie on the back.
At this point all you have left to do is take the remaining piece of your t-shirt and make a tube for your top and wear (I didn't make the tube because I actually don't plan on wearing mine- not all of us have small chests like Milla)