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MN2106 Rowan / Sewalongs / Sewing Techniques / Tips & Tutorials

How to sew a Shell Tuck Knit Hem

how to sew a shell tuck stitch on the Rowan tee and bodysuit by Megan Nielsen Patterns

Hi friends! Today I have another fun sewing technique to share with you that would be perfect for your Rowan tee or bodysuit! Have you ever seen that little scallop edge finish on some knits? That is called a Shell Tuck Stitch (or Picot Hem Stitch), and is found on most machines! The stitch alternates between straight stitches and then a single zig zag stitch that drops off at the edge of the fabric, which then pulls it back in when going back to straight stitches. That pull of the fabric is what creates the little scallop.

Let me show you how to adjust the settings on your machine, as well a few variations you can get by playing with those settings!

how to sew a shell tuck stitch on the Rowan tee and bodysuit by Megan Nielsen Patterns

First off, this is what the Shell Tuck Stitch looks like. On my machine, its actually the vari-overlock stitch. But this shape is what you’re looking for – straight stitches with single zig zags to the right (kind of a mirror image of a blind hem stitch, which is #7 on my machine).

how to sew a shell tuck stitch on the Rowan tee and bodysuit by Megan Nielsen Patterns

Adjust your stitch width to the highest setting (mine is 5).

how to sew a shell tuck stitch on the Rowan tee and bodysuit by Megan Nielsen Patterns

Adjust the stitch length to somewhere between 2-3. I’ll show you how this affects the appearance of the scallops on some samples. The smaller the stitch length, the smaller the scallop.

how to sew a shell tuck stitch on the Rowan tee and bodysuit by Megan Nielsen Patterns

Now turn your tension to the highest setting (mine is 10).

You may be able to lower your tension slightly if you’re working with a really thin knit. But start with the highest setting and go from there.

how to sew a shell tuck stitch on the Rowan tee and bodysuit by Megan Nielsen Patterns

Grab a scrap piece of fabric and fold it in half. With your needle at the far right position for the stitch, place the fabric under your presser foot with the folded edge right up against the needle. You want that needle to hit right at the edge of the fabric when it zig-zags. The further away from the fabric it hits, the less pronounced the scallop will look.

how to sew a shell tuck stitch on the Rowan tee and bodysuit by Megan Nielsen Patterns

Here is an example of two different stitch lengths. The left is a shorter stitch length of 2, the right is a stitch length of 3. It just depends on the look you’re going for.

Practice on many scraps to get your perfect setting, and to practice keeping your fabric straight to get even scallops every time.

Also, press, and even steam, your scallops after stitching. This helps relax the fabric back to its original shape if there was any stretching happening while sewing.

how to sew a shell tuck stitch on the Rowan tee and bodysuit by Megan Nielsen Patterns

Here is another example of stitch length 3 (left) and stitch length 2 (right) on a different color fabric.

how to sew a shell tuck stitch on the Rowan tee and bodysuit by Megan Nielsen Patterns

Now here’s my finished Rowan tee. Everything was constructed as usual, even hems. It is completely finished, construction wise. Now let’s add some scallop edge finishing, after the fact.

how to sew a shell tuck stitch on the Rowan tee and bodysuit by Megan Nielsen Patterns
how to sew a shell tuck stitch on the Rowan tee and bodysuit by Megan Nielsen Patterns

On this tee, I went with the stitch length of 3 alonng the neckband and sleeve hems. You could also do the bottom hem, if you’d like.

how to sew a shell tuck stitch on the Rowan tee and bodysuit by Megan Nielsen Patterns

Here is a sleeve with the shorter stitch length of 2.

how to sew a shell tuck stitch on the Rowan tee and bodysuit by Megan Nielsen Patterns

And that’s it! Have fun, and practice practice practice!


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rowan tee and bodysuit by Megan Nielsen Patterns

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About Author

Holly writes part time for the Megan Nielsen blog– sewing like crazy, creating tutorials and sewalongs. She has been sewing since she was a little girl, and has her degree in apparel design. Now she’s a stay at home mama, and spends all her free nap times at her sewing machine.

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