The Result:

1. Open photoshop and Create a new file. 8px wide and 1 px in height.

2. zoom it to get a closer look, and using the retangle marquee tool select 6 pixels, leaving 1 px on each side.

3. fill the selection with the color you want the ‘stich’ or ‘dash’ to be.

4. Click Edit –> Define Patteren

5. Now, on the document you want the ‘stitch to be, create a selection using ‘single row marquee tool’.

6. Click Edit –> Fill and, in the fill dialog box, select pattern

7.Select your custom pattern, and wola! You’ll have a stitched line /  dashed line.