Every embroidery design, from a tiny monogram to a full jacket back, is built from three basic stitch types: run, satin and fill. Picking the right one for each part of a design is one of the first decisions a digitizer makes, and it has a bigger effect on how the finished piece looks and wears than most people expect.
Customers often ask me why their logo has shiny borders in one place and a flatter, textured area somewhere else, or why a shape they expected to be satin came back as fill. Here is how I decide between satin stitch and fill stitch, with the width ranges most professional digitizers work to.
The three stitch types at a glance
- Run (walk) stitch: a single line of stitches, like a pencil line. Used for fine outlines, small details, travel paths hidden under other stitches, and underlay.
- Satin stitch: stitches that zigzag tightly from one side of a column to the other. Long, parallel threads catch the light, which gives satin its smooth, glossy look.
- Fill (tatami) stitch: rows of shorter stitches laid side by side in a staggered pattern to cover a large area. It looks flatter and more textured than satin, and it is far more durable over big shapes.
When to use satin stitch
Satin is the right choice for narrow shapes: borders, lettering, thin columns and small elements that need to look crisp and raised. As a working guide:
- Under about 1 mm wide: too narrow for a clean satin. Use a run stitch or a bean (triple) run instead.
- About 1–2 mm: fine satin. Good for small lettering and thin outlines, usually with a center-run underlay or none.
- About 2–7 mm: the ideal satin range. This is where satin looks its best: full, glossy and clean-edged.
- About 7–10 mm: borderline. Most machines can handle it, but long stitches start to sit loose. Split satin (which breaks long stitches into shorter ones) can help.
- Over about 10–12 mm: switch to fill. Long satin stitches snag on buttons, zippers and washing machine drums, and they loosen over time.
Satin also needs the right foundation. Wider columns need edge run plus zigzag underlay to hold their shape, which we explain in detail in what underlay is and when to use each type.
When to use fill stitch
Fill is the tool for anything wide or large: backgrounds, big letters on a jacket back, solid shapes in a logo, and any area too wide for satin. Fill works well because each stitch stays short (typically around 3.5–4.5 mm), so it lies flat and resists snagging no matter how big the shape is.
A few things a digitizer controls in a fill:
- Density (row spacing): a common starting point is around 0.4 mm between rows for standard 40 wt thread. Lighter fabrics and large areas often go more open; textured fabrics may need it tighter.
- Stitch angle: changing the angle between neighboring fill objects adds visual separation and spreads the pull across the fabric instead of in one direction.
- Pattern: plain tatami is the default, but decorative fill patterns can add texture without changing the stitch type.
Satin vs fill: side-by-side comparison
- Look: satin is shiny and raised; fill is flatter with a subtle woven texture.
- Best width: satin roughly 1–7 mm; fill for anything wider than about 10 mm (and often from 7 mm up).
- Durability: satin is strong at narrow widths but weakens as stitches get longer; fill stays durable at any size.
- Stitch count: for the same area, satin usually uses fewer stitches on narrow shapes, while fill is more efficient over large areas because satin isn't practical there anyway.
- Pull on fabric: satin pulls strongly in one direction across the column; fill spreads pull more evenly but still needs compensation.
How a digitizer combines them in a real logo
Most logos use all three types together. A typical left-chest logo might look like this:
- Fill for the large solid shape or background panel.
- Satin for the border around that shape and for the main lettering.
- Run stitch for very fine details, such as thin lines in an illustration or small accent strokes.
Where satin and fill meet, the digitizer adds overlap and pull compensation so the border actually covers the edge of the fill after the fabric draws in. Satins pull narrower across their width, so they typically get around 0.2–0.4 mm of compensation on standard fabrics. If you want the details on that, read how much pull compensation to use.
Common mistakes with satin and fill
- Satin stretched too wide. A thick border scaled up for a jacket back can end up 12 mm or more wide. It will look fine on screen and loose on the garment. Converting it to fill fixes the problem.
- Satin squeezed too narrow. Scaling a design down can push columns under 1 mm, which causes thread breaks and bunching. This is one reason resizing a stitch file has limits.
- Fill used for small text. Small letters filled with tatami look fuzzy and lose their shape. Letters under about 10–12 mm tall should almost always be satin.
- Every fill at the same angle. Neighboring fills that all run in the same direction blend together and pull the fabric one way, which encourages puckering.
- No overlap between fill and border. Without overlap and compensation, small gaps of fabric show between the outline and the fill.
Why auto-converted files often choose wrong
Auto-digitizing software decides stitch types from the image alone. It doesn't know the design will go on a cap instead of a polo, and it often assigns satin to shapes that are too wide or fill to lettering that should be satin. The result can look acceptable as a preview and stitch out poorly.
When we create a file by hand, each object gets the stitch type, width, angle and density that suits its size and the fabric you're stitching on. Our hand digitizing service for logos and artwork uses no auto-conversion. Designs 6 inches or less are $10, larger designs are $20, and files are delivered by email within 12 hours in EMB, DST, PES, JEF, XXX, VP3, SEW, HUS and more. Size changes and tweaks after delivery are free, and if a design doesn't stitch right, we re-digitize it until it does. You can see how our digitizing service works before ordering.
If you'd like to see these choices in finished designs, browse our machine embroidery designs, with 600+ files available for instant download.
Quick FAQ
What is the maximum width for a satin stitch?
Most digitizers keep satin under about 7–8 mm for best results and switch to fill above roughly 10–12 mm. Split satin can stretch that range a little, but very wide satin snags and loosens with wear.
Can I change satin to fill in a DST or PES file?
Not cleanly. DST and PES store individual stitches, not objects, so the stitch type can't be properly recalculated. The change has to be made in the original working file (such as EMB) or by re-digitizing the shape.
Is satin stitch or fill stitch better for lettering?
Satin is better for most lettering, especially small and medium text, because it stays crisp and readable. Fill is used for very large letters, such as on jacket backs, where satin columns would be too wide.
Need a logo with the right stitch types for your fabric? Order custom embroidery digitizing and get your file within 12 hours.