Pattern markings show where different parts of a sewing pattern align or where a construction detail belongs. Notches are edge markings that can be transferred as tiny snips within the seam allowance.
What do matching marks indicate?
They may identify:
- the front and back of a sleeve
- collar, waistband, or pocket attachment points
- the beginning and end of gathering or easing
- pleat positions and panel seams
- checkpoints along long or curved seams
Single, double, and triple marks distinguish different locations. On many commercial patterns, double notches identify the back sleeve, but the legend supplied with the pattern is always authoritative.
A marking is not the same as a snip
The marking is information printed on the pattern piece. A notch snip is one method of transferring an edge mark to fabric. Internal dots, dart points, and pocket placements cannot be transferred by cutting the edge; use chalk, a removable pen, tracing tools, or tailor’s tacks instead.
Making notches safely
A snip must stay entirely inside the seam allowance. A few millimeters is enough. Cutting too deeply can reach the seamline and weaken the finished seam. Mark rather than snip when the allowance is narrow or the fabric is loosely woven, prone to running, or likely to tear farther.
There is no need to cut a triangular wedge from the fabric. A short, straight snip at the exact point is clear and removes no useful material.
Matching during sewing
Place corresponding marks together, then distribute the fabric evenly between them. If raw edges align but notches do not, check whether pieces have been swapped, rotated, or cut in different sizes. Temporary basting helps hold a difficult curve while its alignment is checked before permanent stitching.