The raw edges of the seam allowance are trimmed with pinking shears.
Most fabrics except those very prone to raveling.
Fast and easy. Doesn’t add bulk to the seam allowance.
Doesn’t look as neat and clean as other methods. May not keep very ravelly fabrics from fraying, especially if the finished item will be laundered. Requires special scissors to make.
How to Make
Just trim the edge of the seam allowance with pinking shears. And trim the seam allowances first, then press them open. This way, both sides will be trimmed at once, saving time. However, if you’re working with a very bulky fabric that’s difficult to cut through, press the seam allowance open first, then trim each side separately.