Merrowed edge

A merrowed edge is the rolled overlock border a merrow machine stitches around a patch's outer perimeter, wrapping the raw cut edge in a tube of thread so it can't fray. The border color is usually chosen to match or contrast with the patch's background fabric, and its thickness is adjustable, some run a thin sixteenth of an inch, others build up a chunkier rolled edge that reads almost like piping around the design.

It's the finish behind the classic look on letterman jacket patches, motorcycle vest patches, and scout badges, the rounded, slightly raised border that signals a traditional patch rather than a modern one. Laser-cut, or die-cut, patches skip that border entirely and trim right to the embroidery's outline instead, giving a flatter, more contemporary silhouette that's become common on streetwear and outdoor brand patches.

Merrowed edges suit simple round, oval, or shield shapes, the machine needs a fairly smooth outline to follow cleanly. Anything with sharp points, deep notches, or negative space cut into the design usually can't take a clean merrow pass and gets specced as laser-cut instead, so the shape of the artwork often decides the edge style before cost even enters the conversation.

Buyers sometimes assume any patch shape can take either edge finish as a simple preference. Complex outlines with points or cutouts typically can't hold a merrowed border without distorting the shape, so a laser-cut edge isn't just a style choice there, it's often the only finish the artwork can physically support.