I have another camp shirt to upcycle.  I decided this beautiful color palette would make a beautiful summer dress. 

I started by cutting off the sleeves and the top of the shirt right under the collar.

I removed the top button, pinned and hemmed the top edges.

I put the shirt/dress on inside out and pinned it down the sides to fit.  Once I got to the waist, I took the dress off and pinned it the rest of the way down angling out to the bottom corners.  I sewed each side and cut off the excess.

I turned it right side out and it fit perfectly!  No need for straps I was afraid I was going to have to add.