Types of Embroidery Stitches Explained (Satin, Fill, Running)

Machine embroidery uses several different stitch types, each suited to a different purpose in the design. Understanding these stitch types helps you predict how your digitized design will look and stitch out — and why some design elements need to be a certain size to work properly.

Running Stitch

The running stitch (also called a walk stitch) is the most basic machine embroidery stitch — a single line of needle penetrations. Running stitches are used for: outline details, travel paths between elements, underlay for other stitch types, and small text details. Running stitches are the finest lines available in machine embroidery.

Satin Stitch

Satin stitches are parallel stitches that fill a defined shape with a smooth, shiny surface. They're the go-to choice for: text (letters), thin borders and outlines, small shapes (stars, narrow elements), and any area where a smooth, sheen surface is desired. Satin stitches work best on shapes between 1 mm and 12 mm wide. Very wide shapes may gap or pull.

Fill Stitch (Tatami / Flat Fill)

Fill stitches cover large areas with rows of running stitches in a grid or angled pattern. They're used for: large color areas (backgrounds, solid shapes), areas wider than 12 mm where satin stitch would pucker, and animal fur or texture effects with directional angling. Fill stitches are the most common stitch type in logo and image embroidery.

How SewFlow Assigns Stitch Types Automatically

When you upload an image or type text in SewFlow, the digitizer automatically analyses each region and assigns the appropriate stitch type. Thin lines get running or satin stitches; larger color regions get fill stitches; outlines get satin border stitches. You can see the result in the stitch preview before downloading.