The edge of a patch does two jobs: it frames your design and it stops the patch from fraying. The right border depends on your patch shape, the material and the look you want.
Merrowed border
A merrowed border is a thick, raised, overlocked edge that wraps around the outside of the patch. It gives the classic, finished look seen on many embroidered and woven patches. Merrowed borders work best on simple shapes such as circles, ovals, squares and rectangles, because the machine follows a smooth outline.
Satin-stitched or hot-cut border
For custom shapes with corners, points or curves, the border is often stitched as part of the design and the patch is then cut close to the edge. This lets the patch follow almost any outline, from stars and shields to letters and mascots, while keeping a neat, sealed edge.
Heat-cut and laser-cut edges
Woven patches and some embroidered patches can be cut with heat or a laser, which seals the threads as it cuts. The result is a clean, flat edge with no raised border, which suits modern, minimal designs and detailed shapes.
Edges on PVC and leather
PVC patches are moulded, so the edge is formed as part of the patch itself and can follow almost any shape. Leather patches are cut to shape and often finished with stitching around the edge for a crafted look.