Understand Pattern Notches Before Cutting Them Away

A small notch on a paper pattern can carry information that a long plain edge does not. It may help match sections during assembly or distinguish one part of a piece from another. Before cutting around it or trimming an allowance, read the pattern key and determine what that particular mark is telling you.

This article concerns matching marks supplied with a pattern. Notches removed from an outward curved seam allowance during finishing are a different operation. The same word appears in both contexts, so keeping their purposes separate prevents an identification task from becoming an unnecessary cut into the fabric.

Read the symbol in its own pattern

Find the key or glossary and inspect how the designer represents matching marks. Do not assume that every triangle, short line or group of marks uses the same convention as the last pattern you sewed. Check the selected size too, since several nearby symbols may belong to different outlines.

BERNINA's marking guide lists alignment notches among construction information that should be transferred. Use that purpose as the starting point, not a universal interpretation that one notch always identifies a particular garment side. The actual piece labels and instructions establish how the marks relate.

Connect matching marks before the pieces separate

Look at the relevant construction step and identify which edges will join. Compare their marks while the pattern pieces are still clearly labeled. This can reveal a mistaken piece selection or a size-line error before fabric is involved.

Do not expect every pair of cut edges to be identical in length simply because matching marks correspond. Some construction includes intentional shaping or ease, explained by the designer. A notch helps locate the relationship; it does not authorize stretching one piece until every raw edge looks the same or trimming off the difference.

Choose a suitable transfer method

Use a method recommended for the pattern and appropriate to the actual cloth. A temporary drawn mark, thread mark or carefully specified clip may be suitable in different circumstances. Test marking tools on scraps and check their removal instructions before placing them on the project fabric.

If clipping is the chosen method, follow its depth and location guidance and keep it within the intended allowance. Do not cut a large inward triangle merely because the paper symbol looks triangular. On narrow allowances or fabrics that fray readily, ask for an appropriate alternative if the suggested cut seems uncertain.

Transfer the information to every required layer

Check whether marks need to appear on both pieces cut together and on each member of a mirrored pair. A visible mark on the top layer is not evidence that the lower layer received the information. Keep the pattern and fabric orientation clear while making the transfer.

Before removing the paper, compare the transferred marks with the selected outline and count the relevant groups. Preserve distinctions such as single and double marks where the pattern uses them. Do not simplify several nearby references into one approximate mark because the edge seems easy to match by eye.

Protect the marks through preparation

Keep each piece identifiable after cutting and through any relevant edge finishing or pressing. Check whether the chosen method might erase, hide or remove a mark before its construction step. If that could happen, preserve the reference through an appropriate method while the paper pattern remains available.

Do not notch both matching edges from memory after the original reference is gone. Return to the actual pattern if needed and verify the location. An invented pair of marks may line up perfectly with each other while placing the seam relationship somewhere the design never intended.

Use notches alongside the other evidence

When arranging a seam, compare piece names, intended sides, seam lines and matching marks together. Stop if the relationship remains contradictory. A notch is useful evidence, but it cannot make a wrong-size piece, a reversed layer or an incorrectly cut component become suitable.

Keep uncertainty visible and resolve it before permanent stitching. Once the pieces are joined correctly, proceed with the pattern's finishing instructions, treating any later curve clipping or trimming as its own task. Understanding why a small matching mark exists preserves the information you need without removing fabric simply because a triangle appeared on the paper.