What is a fat Quarter? I often get asked at the sewing classes what is a fat quarter? A Fat Quarter is made by cutting half a meter of the full fabric width and then cutting this piece in half vertically (essentially cutting it by the width). Fat Quarters are usually cut from quilting fabrics as they provide a smaller piece (essentially quarter of a meter ) but in a way that you still get a sizeable piece of the design. The second diagram shows in black a fat quarter cut from