Topstitching: Types, Purposes and Uses

Every topstitch is a stitch, but not every stitch is a topstitch. A topstitch is specifically an exposed stitch: a line worked from the right side so it stays visible on the face of the garment. A plain construction stitch, by contrast, is usually hidden inside the seam.

No, though they’re related. Edgestitching is simply a topstitch placed very close to the seam or fold, about 1–2 mm.

A little longer than a construction seam reads as cleaner and more deliberate. Specify it in the tech pack rather than leaving it to the manufacturer.

For a defined line, use a heavier topstitch thread (for example 30 wt) on top and keep regular 50 wt thread in the bobbin to avoid tension issues. If you want a stronger visual, a thicker thread or two threads through a single needle exaggerates the line. Always note the thread reference and colour in the BOM.

A special topstitch needle (90/14 or 100/16) has a larger eye and a rounded-sharp point that carries heavier thread cleanly. Match the size to the thread and fabric weight; the wrong needle is a frequent cause of skipped stitches on a visible line.

It depends on the type. Edge stitching sits at 1–2 mm; a basic single topstitch typically runs 7–12 mm from the seam or edge. Double rows are usually about 6 mm apart, and an off-seam topstitch must state an exact distance because it isn’t anchored to the seam.

Lower the top tension slightly, add a stabiliser on lightweight fabrics, use a sharp topstitch needle, and sew parallel rows in the same direction. On layered or stretchy fabrics a walking foot helps the layers feed evenly. Pressing won’t hide a pucker that started as a tension or feed problem.

Guide the fabric off a fixed reference rather than watching the needle: the edge of the presser foot, an edge-stitch foot with a centre blade, a quarter-inch foot, or a seam guide on the bed of the machine. Shifting the needle position lets you fine-tune the distance while keeping the foot against the edge.

At a corner, stop with the needle down, lift the presser foot, pivot the fabric, then lower the foot and continue, so the line stays continuous. On curves, slow down and shorten the stitch slightly, guiding the fabric gently without pushing or pulling, which keeps the curve smooth and avoids distortion.

Both are valid; it’s a design decision. Tonal (matching) thread keeps a topstitch discreet when its job is mainly structural. Contrast thread, such as gold on denim, turns the same line into a feature. Whichever you choose, specify it clearly so the factory doesn’t default to the wrong one.

State four things: the number of lines, the distance from the seam or edge, the stitch length, and the thread. Better still, reference the ASCS code for the seam so the topstitch is defined once and reads the same to every vendor, instead of being described in a sentence each factory might interpret differently.