We need a linear stitch and after looking trough this pile
Other English names are Double Running Stitch (tells you how it is worked!), Line Stitch, Two-sided Line Stitch, Two-sided Stroke Stitch, Square Stitch, Romanian Stitch and Chiara Stitch.
In Swedish it is called Holbeinsöm. In French there are two names: Point de Holbein or Double Point Avant.
Work it like this:
It looks good when it is used to make pattern like this.
Here is some more interesting reading and great pictures..
1) Make a row on the Aida sampler
2) Fill in a square on this 'canvas'.