The measurements that you will need are;
1. Measure across your shoulders with arms outstretched from one elbow to the other. If you would like a little less drape, you can shorten this measurement to approximately the middle of your upper arm.
2. Desired length of top. Measure from shoulder to desired length.
3. Hip measurement.
Begin by drawing a rectangle that is the shoulder measurement by the desired length of the top.
The point on the end of the side seam is rather severe, so I rounded it just a bit.
You will cut 4 of the neckband on the fold and 2 of the main body of the top.
It's a little difficult to see, but I added a 4" band to the bottom of my top. This is just 1 long rectangle.
If the band were made wider, this could also be a great dress. If your drape is as deep as mine, you might want to wear a camisole or tank underneath the top. I like to wear a t-shirt under mine.
A very easy to draft top or dress that is lots of fun to wear. Good luck if you decide to give it a try.