Learn to knit mitered squares CDD spine seam in a solid yarn color. They are formed by decreasing stitches that meet in the middle. This mitered square uses the Center Double Decrease (CDD) technique to create a raised diagonal ridge down the center, my favorite way to knit mitered squares. Start knitting these mitered squares with these detailed photo instructions, cast on cheat sheet, close-up video tutorial, and free printable written pattern on my Studio Knit website. | Studio Knit