A top stitch is a decorative occasionally functional stitch which is typically ¼” of the edge from the seam. The seam is visible because is on top of the project (ie topstitching is visible on the picture of the jacket located to the side of this description). Another example would be a when a vest is turned a person may stitch 1/4” from the edge on top of the garment to create further stabilization. This type of stitching can be done with similar or contrasting colored thread to create further decorative effects.