Just how fat is a Fat Quarter? A Fat Quarter is the “fat” half of 1/2 yard of fabric. It is 18 inches by approximately 22 inches (depending on how wide your fabric is from selvage edge to selvage edge). The Fat Quarter is a great squarish piece of fabric, perfect for quilting or small fabric crafts. Fat Quarter bundles are available in any variety of fabrics I have in stock. Why choose just one pattern when you can have 4 or more. Come grab bundle from the shop!