If you use a block design for the square, then I would consider a border stencil for the rectangle. These designs can be adjusted for length. However when using distinctive designs such as this I would set the block units in a structured way to give a uniform overall design.
Have I read your post correctly that you want to quilt individual units and not all over?
Last edited by Holice; 11-05-2013 at 07:27 AM.