How to sew a french seam | Clean & durable finish
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How to sew a French seam | Clean & durable finish
A French seam is a sewing technique that encloses raw fabric edges inside the seam. It creates a neat, durable finish on both the inside and outside of the garment — ideal for lightweight or sheer fabrics.
Step-by-step instructions
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Prepare the seam allowance
Use a seam allowance of 2 cm (¾″) to allow enough fabric for the French seam construction.
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Sew with wrong sides together
Place the fabric pieces wrong sides together and sew a first seam 1 cm (⅜″) from the raw edge.
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Trim the seam allowance
Trim the seam allowance down to approximately 0.3 cm (⅛″) to reduce bulk inside the final seam.
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Press the seam
Press the seam flat with an iron to set the stitches neatly before moving to the next step.
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Turn right sides together
Fold the fabric so the right sides are now facing each other, enclosing the trimmed seam inside.
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Press again
Press along the folded edge to keep everything aligned and ensure a crisp, clean result.
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Sew the final seam
Sew a second seam 1 cm (⅜″) from the folded edge to fully enclose the raw edges for a clean, finished result.
Pro tip
French seams work best on lightweight fabrics such as cotton lawn, voile, silk, or viscose. Always press carefully at each step for a crisp, professional result.
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