Use the Quick Curve Ruler to easily cut curves. It is used to cut the curve shapes out and square the blocks up after piecing.
The ruler is a quality acrylic ruler with a curved cut-out where your rotary blade - regular or jumbo - will fit into. It's 7" x 12" in size and has a hang hole for storage convenience.
The ruler comes with a free pattern called "Urban Runner". Use it with all Sew Kind of Wonderful patterns.