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Topstitch is a line of stitches that is visible on the right side of the garment. Generally it is preferred to sew topstitching with the right side of the fabric facing up so the needle impressions are expressed toward the wrong side. Stitch length of topstitching is often slightly increased for aesthetics. Top stitching can be used both as a style element (eg. the decorative stitching on back jean pockets) and as seam reinforcement.

Trimming and grading a seam allowance means to cut off some of the width of the seam allowance after stitching. Depending on the type of seam, a common seam allowance after trimming is 1/4” (6 mm).