Flat piping tutorial

Here is a tutorial on how to sew flat piping. The tutorial was made using the Airelle blouse pattern by Deer & Doe, that’s why you’ll find, in the frames, specific instructions for this pattern.

Adding flat piping is an easy way to embellish a garment, or do variations on a pattern, by  accentuating a seam with a contrasting (or coordinating) fabric. Here is how to do it in 5 easy steps !

[box]For the Airelle blouse, the flat piping will be added just after sewing the darts, at the yoke-front and yoke-back seams.[/box]

1- Cut bias strips

For a flat piping of 0.5 cm, cut a strip in the bias with the following dimensions:
Length = length of edges to add piping to.
Width = (seam allowance + 0.5 cm) x 2


[box]Airelle Blouse

Length = length of the edges to “flat pipe” – For my Airelle blouse that’s the front edges of the shoulder yoke + back edge of the shoulder yoke.
Width = (1.5 + 0.5) x 2 = 4 cm [/box]

2- Create the flat piping

Fold the bias strip in 2, widthwise and press.
[box]Airelle Blouse

We now have a strip that is 2 cm wide.[/box]


Fold in 2 and press.

3- Stitch the flat piping

Lay the bias strip on the right side of the garment along the seams you want to add flat piping to, aligning raw edges. Pin.

[box]Airelle Blouse :

Align the piping strips along the front and back edges of the shoulder yoke, on the right side. [/box]


Epingler le passepoil

Pin the flat piping on the right side of the fabric, aligning raw edges.

tuto passepoil

Flat piping pinned on the 2 front edges of the shoulder yoke. As you can see on the pic, I had already sewn the flat piping at the back and shoulder yoke seam.

Stitch within the seam allowance to secure the flat piping.

[box]Airelle Blouse :

The seam allowance being of 1.5 cm, stitch at 0.5 or 0.7 cm from the raw edges.[/box]


Stitch the piping on the right side of the fabric within the seam allowance.

flat piping stitched !

4- Sew the seam

Lay, right sides together, the two pieces that need to be joined, the piping is sandwiched in between. Stitch using the seam allowance given in the pattern instructions.

[box]Airelle Blouse :

After gathering the top edges of the front, lay them on the shoulder yoke, right sides together, the piping being sandwiched in between, stitch according to the instructions with a seam allowance of 1.5 cm.

Do the same with the back : lay the back on the shoulder yoke, right sides together, the piping being sandwiched in between, and stitch.[/box]


Flat piping sandwiched between the shoulder yoke, on which it was previously sewn, and the upper edge of the front (gathered).

Seam sewn !

5- Finishing

Overcast / serge the seam allowance.
Press the seam allowance down.

Marge surjetée et repassée vers le bas - Ici vue de la couture dos-empiècement

Seam allowance serged and pressed down – Here you can see the back + shoulder yoke seam on the Airelle blouse.

And that’s it, flat piping added ! Easy peasy, right?

Flat piping tutorial

Flat piping added !

Flat piping on my Airelle blouse

I love this technique, it opens up new possibilities for easy pattern customization.

My Airelle blouse is done, You can see it right here : Airelle “dragibus” blouse

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