For the circular cape, you are going to want to start off with a full circle cape and then trim as necessary. To do this, you will need a circle to base your cape off of, in this case we used a oatmeal container.
Draw the circle from the base of the oatmeal container onto the fabric and then using a ruler, mark the amount of inches from your models neck to their elbow. In our case it is 11 inches, 10 inches plus one inch seam allowance, out from the circle in all directions.
When you have marks all around your inner circle, connect them to form a full circle and cut out.
Slice the circle at one point and cut out the middle circle.
Pin one side of the circular cape to the vest, and try it on your model.
Drape the cape around the model. The cape should be just shy of a full circle to hang right, so view it on your model and mark where the vest needs to hit at the edge of the vest underneath.
Trim off the excess fabric.
Turn the front edges of the cape under about a 1/2 an inch and hem, it isn’t necessary to hem the bottom edge of the cape as you will be adding trim.