Step-by-Step Guide: Sewing Knitted Seams Like a Pro

Step-by-Step Guide: Sewing Knitted Seams Like a Pro

Are you a knitting enthusiast who loves creating stunning garments, but struggles when it comes to sewing the seams together? Don’t worry, you’re not alone! Sewing knitted seams can be a challenge, as knitting produces stretchy fabrics that require a different approach compared to sewing woven materials. But with a few tips and techniques, you can sew knitted seams like a pro and achieve beautifully finished projects.

First and foremost, preparation is key. Before you even start sewing your knitted seams, it’s important to prepare your pieces properly. This means blocking your knitted panels to ensure that they are the correct size and shape. Blocking involves soaking your knitted pieces in water, gently pressing out the excess moisture, and then laying them flat to dry on a blocking board or towel. This process evens out any uneven stitches, helps your pieces relax into their intended shape, and ensures that they will fit together seamlessly when sewn.

Next, choose the right sewing technique for your project. There are several different ways to sew knitted seams, and the technique you choose will depend on the type of seam you want to achieve. The most common methods include mattress stitch, backstitch, and whip stitch. Mattress stitch is great for invisible seams on the sides of garments, backstitch is perfect for more visible seams and decorative effects, and whip stitch is ideal for joining pieces with a decorative finish. Make sure to research and practice each technique to find the one that suits your project best.

Finally, take your time and pay attention to detail. Sewing knitted seams requires patience and precision. The key to achieving professional-looking results is taking your time and paying attention to detail. Make sure to match your stitches and row counts as closely as possible for a seamless look. Use stitch markers or pins to keep your pieces aligned and in place. And don’t forget to weave in any loose ends as you sew, so you don’t have to go back and do it later. Remember, the extra time and effort you put into sewing your knitted seams will be well worth it when you see the finished product.

With these tips in mind, you’ll be well on your way to sewing knitted seams like a pro. Remember to prepare your pieces properly, choose the right sewing technique, and take your time to achieve the best results. Happy knitting and sewing!

Basics of Sewing Knitted Seams

Sewing knitted seams is an essential skill to learn for any knitter. It allows you to join knitted pieces together to create a finished project. Here are some basic steps to help you sew knitted seams like a pro:

  1. Prepare your knitting: Before sewing the seams, make sure to block your knitted pieces. Blocking helps straighten and even out the stitches, making it easier to sew the seams neatly.
  2. Choose a suitable yarn: When sewing knitted seams, it’s best to use a yarn that matches your knitted project. You can use the same yarn as the one you used for knitting or a matching yarn in a similar weight and fiber content.
  3. Lay out your pieces: Lay out the knitted pieces on a flat surface, aligning the edges you want to sew together. Use straight pins or locking stitch markers to hold the pieces in place.
  4. Select a suitable sewing method: There are several sewing methods you can choose from for sewing knitted seams, including mattress stitch, whip stitch, backstitch, and slip stitch. Each method has its own advantages and creates a different finished look.
  5. Start sewing: Thread a tapestry needle with a length of yarn and insert it under the first stitch on the edge of one piece. Then take it over the corresponding stitch on the edge of the other piece, creating a loop of yarn. Continue sewing in this manner, pulling the yarn snugly but not too tightly.
  6. Secure the seam: Once you reach the end of the seam, secure the yarn by weaving it in or tying a knot. Cut off any excess yarn, leaving a small tail.
  7. Finishing touches: After sewing all the seams, you may want to block your project again to help the seams lay flat. You can also use a steam iron on a low setting to give the seams a polished look.

With practice, you’ll become more confident in sewing knitted seams, and your finished projects will have a professional-looking finish. Remember to take your time and enjoy the process!

Choosing the Right Needle and Thread

When it comes to sewing knitted seams, choosing the right needle and thread is crucial. Whether you’re sewing by hand or using a sewing machine, using the right tools can make a big difference in the final result of your seam.


When sewing knitted seams by hand, it’s important to choose a needle that is suitable for the weight and texture of the yarn you’re working with. Here are some factors to consider when selecting a needle:

  • Size: Choose a needle that is appropriate for the weight of your yarn. Thicker yarns may require larger needles, while finer yarns may require smaller needles.
  • Length: Longer needles are often easier to work with when sewing larger seams, while shorter needles can be more suitable for smaller seams or intricate work.
  • Material: Needles are available in various materials, such as metal, plastic, or wood. Consider your personal preference and the type of yarn you’re working with when choosing a needle material.
  • Taper: Some needles have a sharp taper, while others have a more rounded tip. The taper of the needle can affect how easily it slides through the yarn, so choose one that suits your sewing style and yarn type.


When selecting thread for sewing knitted seams, it’s important to consider both its strength and its appearance. Here are some tips for choosing the right thread:

  • Strength: Knitted seams require a strong thread that can withstand the stretching and pressure that the seams may experience. Look for a thread that is specifically designed for sewing knitted fabrics or one that is known for its strength.
  • Color: Choose a thread color that matches or complements the color of your knitted fabric. If you’re unsure, a neutral color such as black, white, or gray can be a good choice.
  • Type: There are different types of thread available, such as polyester, cotton, or nylon. Consider the type of yarn you’re working with and choose a thread that is compatible in terms of fiber content and strength.

It’s always a good idea to test your needle and thread on a scrap piece of your knitted fabric before sewing your actual seams. This will give you an opportunity to make any necessary adjustments and ensure that you’re using the best combination for your project.

Prepping Your Knitted Pieces

Before you start sewing your knitted pieces together, it’s important to prepare them properly to ensure a clean and polished finished result. Follow these steps to prep your knitted pieces:

  1. Block your pieces: Blocking is an essential step to even out the stitches and dimensions of your knitted pieces. Fill a basin with lukewarm water and add a gentle wool wash or mild shampoo. Submerge your knitted pieces, gently squeezing them to ensure they are completely saturated. Let them soak for about 15 minutes. Remove the pieces from the water and squeeze out the excess moisture by rolling them in a dry towel. Lay the pieces flat on a blocking mat or towel, gently shaping them to the correct measurements. Allow them to air dry completely before moving on to the next step.
  2. Arrange your pieces: Lay out your knitted pieces in the correct order according to the pattern instructions. This will help you visualize how they will be sewn together and avoid any confusion during the sewing process.
  3. Prepare your materials: Gather all the materials you will need for sewing your knitted pieces together. This may include a tapestry or yarn needle, matching yarn, stitch markers, and scissors. Having everything ready beforehand will save you time and prevent interruptions during the sewing process.
  4. Secure loose ends: Before sewing, make sure to secure any loose ends on your knitted pieces. You can do this by weaving the yarn ends through the stitches on the wrong side of the work. This will prevent them from unraveling and ensure a neater finish.

By following these preparatory steps, you’ll ensure that your knitted pieces are in the best shape for sewing. Taking the time to properly prep your pieces will result in a more professional-looking finished project.

Pinning and Marking the Seams

When it comes to sewing knitted seams, proper pinning and marking are key to achieving professional-looking results. Here are some tips to help you pin and mark your seams effectively:

  • Use sharp pins: Make sure to use sharp pins that will go through the knitting without snagging or damaging the yarn.
  • Choose the right pinning method: There are a few different methods you can use to pin your seams, depending on the project and your personal preference. Some common methods include pinning parallel to the seam, pinning perpendicular to the seam, or using a combination of both.
  • Start by pinning the ends: Begin by pinning the ends of your seam together, making sure that the edges align properly. This will help keep everything in place as you work your way along the seam.
  • Pin evenly: Space your pins evenly along the seam, making sure to distribute them in such a way that the fabric is held securely without any puckering or stretching.
  • Leave room for the seam allowance: Keep in mind that when you sew the seam, you will need to leave a seam allowance. Make sure to account for this when pinning your fabric, leaving enough room for the seam allowance on both sides.

Once you have pinned your seam, you may also find it helpful to mark the seam with a fabric marker or tailor’s chalk. This can help you stay on track and ensure that your seam stays straight as you sew.

Remember, practice makes perfect, so don’t be discouraged if your first few seams don’t turn out exactly how you want them to. With time and experience, you will improve your sewing skills and be able to sew knitted seams like a pro!

Types of Knitted Seams

  • Whipstitch Seam: A simple and versatile method for joining two knitted pieces together. To create a whipstitch seam, align the edges of the knitted pieces and sew through both layers in an over-and-under motion.
  • Mattress Stitch: Often used for joining pieces that have straight edges, such as the sides of a sweater. To create a mattress stitch, align the edges of the knitted pieces and work a series of small horizontal stitches between the bars of the V-shaped stitches on each side.
  • Invisible Seam: Ideal for creating an almost seamless join between pieces. This technique involves working the seam using the yarn tails left from the cast on and bind off edges, and weaving them in to create an invisible join.
  • Backstitch Seam: A sturdy and secure seam often used for joining pieces that need extra reinforcement. To create a backstitch seam, align the edges of the knitted pieces and sew through both layers in a back-and-forth motion.
  • Grafting Seam: Also known as the Kitchener stitch, this seam technique is commonly used for joining live stitches, such as the toe of a sock or the underarm of a sweater. It creates a seamless and invisible join by mimicking the knit and purl stitches.

Each type of knitted seam has its own advantages and uses, so it’s important to choose the appropriate technique based on your project and desired outcome.

Step-by-Step Guide to Sewing Garter Stitch Seams

When it comes to knitting, understanding how to sew seams is an essential skill. Whether you’re working with a pattern that calls for garter stitch seams or simply want to add structure to your project, sewing garter stitch seams can be a simple and effective way to join knitted pieces together. Follow this step-by-step guide to learn how to sew garter stitch seams like a pro.

  1. Prepare your knitted pieces: Before you start sewing, ensure that your knitted pieces are properly blocked. This will help ensure that they are the correct size and shape for seaming.
  2. Position your pieces: Lay your knitted pieces flat on a table or surface, aligning the edges that need to be seamed. Use pins or stitch markers to hold them in place if necessary.
  3. Choose your yarn: Select a yarn that matches the color and weight of your knitted pieces. It’s best to use the same yarn that you used for knitting to ensure a seamless look.
  4. Thread your needle: Thread a tapestry needle with a length of yarn, leaving a tail for weaving in later.
  5. Begin seaming: Insert your needle under the first horizontal bar of the garter stitch on one piece, from front to back. Then, insert the needle under the corresponding horizontal bar on the other piece, from back to front. Continue this back and forth motion, working in a zigzag pattern, until you reach the end of the seam.
  6. Keep an even tension: As you sew, make sure to maintain an even tension on your yarn. This will help ensure that your seam is not too tight or too loose.
  7. Weave in the ends: Once you’ve finished sewing the seam, weave in the ends of your yarn to secure them. Use a tapestry needle to thread the ends through the stitches on the wrong side of your work, being careful to hide them as much as possible.
  8. Block again if necessary: After sewing the seam, block your project again if needed to ensure that the seam lies flat and blends in with the rest of the fabric.

With these step-by-step instructions, you’ll be able to sew garter stitch seams like a pro. Practice this technique on small swatches before moving on to larger projects to perfect your skills.

Step-by-Step Guide to Sewing Stockinette Stitch Seams

When knitting in stockinette stitch, it is essential to sew the seams properly to maintain a clean and professional finish. Follow these step-by-step instructions to sew stockinette stitch seams:

  1. Prepare the Pieces: Lay out the knitted pieces with the right sides facing up. This will ensure that the seam is invisible on the finished garment.
  2. Thread the Needle: Use a yarn needle and cut a length of yarn that is twice the length of the seam to be sewn. Thread one end of the yarn through the needle, leaving a small tail.
  3. Secure the Tail: Insert the needle through the first stitch on one of the pieces from the wrong side. Leave a small loop of yarn on the right side to secure the tail.
  4. Begin Sewing: Insert the needle through the corresponding stitch on the opposite piece, going from the wrong side to the right side. Pull the needle and yarn through, leaving a small loop on the wrong side.
  5. Continue Sewing: Repeat step 4, going back and forth between the two pieces. Make sure to sew through the purl bumps of the stockinette stitch, being careful not to pull too tightly or leave any gaps.
  6. Secure the Seam: To secure the seam at the end, insert the needle through the last stitch on one piece, and then through the last stitch on the opposite piece. Repeat this once more to create a knot.
  7. Weave in Ends: Use the yarn needle to weave in any remaining yarn ends on the wrong side of the seam. Trim any excess yarn.

Sewing stockinette stitch seams may take some practice, but with time and patience, you can achieve a seamless and professional-looking finish on your knitted projects.

Finishing Touches for Professional-Looking Knitted Seams

When it comes to creating professional-looking seams on your knitted projects, paying attention to the finishing touches is crucial. Here are some tips and techniques to ensure your seams are tidy and well-executed:

1. Mattress Stitch:

  • Use the mattress stitch method to join two pieces of knitted fabric seamlessly. This technique creates an invisible seam that mimics the knitted stitches, giving your finished garment a polished look.
  • Start by aligning the edges of the pieces you want to join, placing them side by side with the right sides facing up.
  • Thread a tapestry needle with a length of yarn that matches your project.
  • Insert the needle under the first horizontal bar of the edge stitch on one piece, and then under the corresponding bar on the other piece. Repeat this process, alternating between the two pieces, until the seam is complete.
  • Remember to pull the yarn tight after each stitch to ensure a neat and even seam.

2. Blocking:

  • Blocking your knitted pieces before seaming is essential to achieving a professional finish.
  • Wet blocking or steam blocking can be used to even out the stitches and make the seaming process easier.
  • Lay your knitted pieces flat on a blocking mat, and pin them into shape using rust-proof T-pins or blocking wires.
  • Mist the pieces with water or steam them using an iron, being careful not to touch the iron directly to the fabric.
  • Allow the pieces to dry completely before removing the pins.

3. Invisible Cast On and Bind Off:

  • Using an invisible cast on and bind off method will ensure that the edges of your knitted pieces blend seamlessly when seamed.
  • The provisional cast on technique or Judy’s Magic Cast On are good options for creating an invisible cast on.
  • The tubular bind off method or the Kitchener stitch can be used for an invisible bind off.

4. Weaving in Ends:

  • To achieve a professional look, make sure to weave in the ends of your yarn neatly and securely.
  • Use a tapestry needle to weave the ends back and forth through the stitches of your knitted fabric, following the direction of the stitches.
  • Avoid pulling the yarn too tight, as this can distort the fabric.
  • Trim any excess yarn once you are confident that the ends are secure.

5. Finishing Touches:

  • Take the time to carefully steam or block your finished project once all the seams are complete.
  • Check for any loose stitches or uneven tension and make any necessary adjustments.
  • Add any buttons, zippers, or other closures, and ensure they are securely attached.
  • If your project has any decorative elements, such as embroidery or appliqué, make sure they are neatly and securely sewn in place.

By paying attention to these finishing touches, you can elevate your knitted seams to a professional level, resulting in a polished and well-crafted finished project.


What are knitted seams?

Knitted seams are the stitches that join two knitted pieces together.

What is the best way to sew knitted seams?

The best way to sew knitted seams is to use a tapestry needle and matching yarn to sew along the edges of the pieces, using a mattress stitch or a whip stitch.

What is the purpose of knitted seams?

The purpose of knitted seams is to create a neat and strong finish to a knitted project, ensuring that the pieces are securely joined together.

Can I use a regular needle and thread to sew knitted seams?

It is not recommended to use a regular needle and thread to sew knitted seams, as it may create a bulky and visible seam. Using a tapestry needle and matching yarn will ensure a more seamless and professional finish.

How can I make my knitted seams less visible?

To make your knitted seams less visible, you can try using a matching yarn color, sewing along the edges of the pieces using a precision technique like the mattress stitch, and blocking your finished project to even out the tension.


Knitting Help – Slow Motion Mattress Stitch

Leave a Reply

Your email address will not be published. Required fields are marked *