First start with the standard female torso mesh.
Then create a rectangle
And another for the back
Next comes an ellipse. Make sure to place and size it so its touching the centre line.
Next, rather than try and create a new ellipse the exact same size and shape, just duplicate the first and drag into position next to the first.
You could actually leave it there and hide the mesh layer and merge the visible ones to get one solid shape, or you can add some nice thin straps with the line tool
Now just save as either a png or a photoshop (or whatever prog you're using )file.
This way the layer info remains intact and you can add or subtract different elements when you want to use it in the future.Make sure you never overwrite the template when using again.
You also don't need to use ellipses on the upper section.Experiment with different shapes to give you something different
