I originally had plans to add sleeves and make it a dress instead. But, when I tried it on without the sleeves, my husband said it looked really cute how it was, over my black tee. So, I left it. I might add the sleeves later, if I tire of the jumper look.
The cut is very simple. Using your favorite tank, fold it in half, lengthwise and place on fold of fabric, then using your pins draft out a wide A-line, as wide as your fabric will allow to go, starting from the bust of your tank, cut two on fold. I used 2 yards, but I'm really short (5'2).