Read Pattern Symbols Before You Cut
· Drafting, Patterns
Turn grainlines, notches, dots, and seam allowances into a clear cutting and marking plan.
Before cutting, spend a few minutes learning what the marks on your pattern are asking you to do. Some control where the fabric is cut; others tell you how pieces come together. The pattern’s own key takes priority because symbols and line styles vary between makers.
In this article: 1. Identify each piece and its instructions · 2. Separate cutting edges from stitching lines · 3. Read the layout marks · 4. Match the construction marks · 5. Transfer, test, and count
1. Identify each piece and its instructions
Find the piece name, number, selected view, size, cut quantity, and fabric type. A collar may need pieces in the main fabric and interfacing, while a pocket may use a different material. A numbered piece identifies it in the instructions; do not assume the number gives the sewing order.
Set aside pieces used only for other views. On a multi-size sheet, follow the line style for your chosen size all the way around each required piece. Where lines crowd together, mark your route on a tracing rather than guessing with the scissors.
2. Separate cutting edges from stitching lines
The cutting line marks the edge of the fabric piece. The stitching line marks where a seam is sewn. The space between them is the seam allowance. Many multi-size patterns omit drawn stitching lines, so look for the allowance in the written instructions.
Check whether allowances are included and whether particular edges use different amounts. A hem allowance may differ from a joining seam. Add allowances only when the pattern tells you they are absent, and label any you add. Adding them twice changes the garment; leaving them off when required does too.
Try this paper exercise: choose one straight seam and draw its stitching line at the instructed distance from the cut edge. Label both lines. This makes the relationship easier to recognize later on curved seams.
3. Read the layout marks
A grainline arrow specifies how to orient the piece on fabric. It commonly runs parallel to the selvage, but use the pattern’s layout for the required grain or stretch direction. Measure from more than one point on the arrow when aligning a long piece.
A place-on-fold mark directs a particular edge to the fabric fold. That edge usually opens into one continuous piece after cutting; cutting along the fold would split it. Lengthen-and-shorten lines identify suggested adjustment locations. Complete needed paper adjustments before laying out the fabric.
4. Match the construction marks
Notches help align corresponding pieces, including along curves where the cut edges may look different. Single, double, and other notch groups distinguish locations; follow the actual matching instructions rather than treating a notch count as a universal rule.
Dots, squares, and similar marks can identify a dart point, a gathering limit, a seam stopping point, or another precise location. Read the step that uses each mark. Dart legs show which lines meet for stitching. Pleat arrows, button positions, and pocket outlines have their own jobs and should not be mistaken for cutting lines.
Use a pencil to check off the marks you have identified on a spare copy of the instructions. Any unexplained mark becomes a specific question to resolve before cutting.
5. Transfer, test, and count
Test your chosen marking method on a scrap of the project fabric, including its removal method, before marking garment pieces. Follow the tool’s directions about water, heat, and timing. A mark that disappears too soon is as troublesome as one that stays visible.
Transfer the construction marks while the paper and fabric are still aligned. Check both pieces when cutting a pair. Chalk or thread marking can avoid cutting into a narrow seam allowance; any clipped notch must remain safely within the allowance.
- Count the required fabric, lining, and interfacing pieces.
- Confirm the marks are visible on the side where you need them.
- Keep the pattern key and sewing directions beside the cut pieces.
The Pattern Terminology guide is a useful quick reference while you work.