Also known as : straight stitch

This stitch is done by running the needle and thread up and down the cloth at a regular distance. 

running stitch

The length of the stitch on the upperside can vary than that on the underside. Usually, there is more thread shown on the upperside than the underside in a running stitch. Yet, to get the beauty of the stitch, I would suggest to try to keep the length of the stitches on the upperside and underside as same as possible.