In many patterns, you'll see instructions that read "sew with right sides together." But what is the right side of the fabric or the wrong side? 

Right side: When instructions mention the “right side” of fabric, they are talking about the “printed” or “pretty” surface of the fabric. You usually sew things with right sides together so the stitching will be on the inside of the finished project.

Wrong side: The other surface is the “wrong” side of the fabric. The fabric design is sometimes visible on the wrong side of the fabric, but it will be more faded than on the right side.

Exception: If you’re using certain solid fabrics, such as fleece cotton, there may not be a right or wrong side.  They generally look and feel the same on both sides.