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How To Seam a Sweater

Making a sweater for the first time can be intimidating for some stitchers.  Sizing, pattern choices, and the extra finishing that sweaters sometimes require can be major barriers to creating the sweater of your dreams.

Fear no more!  Check out this easy seaming tutorial and get ready to download that sweater pattern you’ve been coveting.

Learn how to invisibly join two pieces of knit or crochet work, such as the front and back panels of the Mountain and Mesa Sweater from the October 2019 issue I Like Crochet magazine (pictured).

Supplies needed:  Yarn to match the project, a tapestry needle, and sweater pieces or scrap work to practice with.

Step 1:  Blocking.  Flattening and smoothing the edges of each piece will make it easier to match the front and back stitches for an even, pretty seam.  Pin the pieces out to the dimensions listed in the pattern and wet block, steam block, or mist with water following the care instructions on the yarn label.  Leave pinned flat until completely dry.

Step 2:  With the right sides of the work facing out and the wrong sides facing each other, pin along the edges to be seamed or use small clips to secure the pieces of work.  The sides of the sweater, the sleeves from the wrist to the underarm, and the shoulder area typically require seaming.  Sewing the seam from the right side rather than inside out ensures that your seam will look great when the sweater is worn.

Step 3:  Thread the tapestry needle with about 36” [91 cm] of yarn. Contrasting yarn is used here for illustration purposes.  Choose yarn to match your project for an invisible seam.  Do not knot the end.  Instead, leave a 6” tail to help tighten the seam later.

Step 4:  Unpin the first few inches of work to be joined and match the edges on a flat surface.  Starting at an edge, insert your needle from the bottom of the work up through the front loop only of the first stitch on one piece.  The front loop of the stitch will be the outermost loop facing you.


Step 5:  Next, insert the needle from the bottom of the work up through the front loop only of the first stitch on the other piece.

Step 6:  Continue matching stitches on the front and back pieces and sewing through the front loop only of each stitch of both pieces, always inserting the needle from the bottom of the work.

Step 7:  Pause after sewing the first few inches of seam.  Gently pull on both ends of your working yarn to neaten the seam.  It should be nearly invisible after a gentle tug.

Step 8:  Try the sweater on after sewing the first seam but before weaving in the ends to be sure the seam is invisible and the sweater fits perfectly.  Adjust the size of the neck opening if necessary.  Repeat steps 4-7 for the remaining seams.  Weave in all ends.  Show off your new sweater with pride!

  • Margaret H.

    This helped immensely as well. I’ve been seaming thru two loops at a time and that always causes a ridge to form. I can see why this would hide the seaming yarn. Awesome!

  • Nancy F.

    Wow, thank you Susan! I have been looking for seaming instructions that leave a flat, lined up, appearance. I will think of you with gratitude whenever I’m seaming. Happy Crocheting!


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