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A French seam is actually a method for making a double seam that is used to hide the rough edges of fabric. French seaming is most often used when making articles of clothing, but it also works well on a variety of other sewing projects. It is a technique that makes the seams of your handmade garment strong, neat, and professional looking, even replacing the need for a serger in some cases. Follow a few simple directions and you will be able to easily sew a French seam on your own.
Steps
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Set up your sewing machine. Use a straight stitch, not a zigzag stitch. Consider the stitch size setting and thread tension you will need for sewing your particular fabric. If you are unsure, consult the directions for your sewing machine and adjust settings accordingly. Also prepare your sewing machine by threading it with a thread that matches the color and strength of the material you are going to sew.
- This is also a good time to plug in your iron, so that it's already heated up when you need it.
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Pin your fabric together so that the wrong sides are facing each other. Putting the wrong sides together is the opposite of what is normally done when sewing a basic seam, so don't worry if it feels counterintuitive. [1] X Expert Source Kpoene Kofi-Bruce
Couture Bridal Designer Expert Interview A French seam requires you to stitch each seam twice, folding over your first line of stitches in order to make your finished seam face the right direction.- Be sure to pin all the way down the seam you are sewing. This will help to make sure your fabric doesn't slip out of line.
- It's a good idea to put pins in so they are perpendicular to your seam line, this way they won't stick you as you move the fabric along in the sewing machine and they will be easy to grab as you move your fabric in the sewing machine.
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Sew the fabric together using a 1 ⁄ 4 inch (0.6 cm) seam allowance, removing pins as you go. To keep your seam allowance the same width as you sew your seam, keep an eye on the seam allowance guide that should be printed on the thread plate of your machine. Another option is to use a 1 ⁄ 4 inch (0.6 cm) presser foot, that way you can just make sure the outer edge of your fabric always lines up with the edge of the presser foot. [2] X Expert Source Kpoene Kofi-Bruce
Couture Bridal Designer Expert Interview- The seam allowance is the amount of fabric that is between the edge of the fabric and the seam. Patterns usually give a specific amount of seam allowance to use, so that your finished project doesn't turn out too bit or too small. [3] X Research source Remember that the french seam will basically require about double the allowance you use on this first seam, so make sure when you are cutting out your pieces of fabric that you have figured that into your measurements.
- Feel free to increase the seam allowance on this first seam to 3 ⁄ 8 inch (1.0 cm), if you are more comfortable sewing that width, but keep in mind that you will need to increase your overall seam allowance to accommodate this.
- It's best to remove pins right before you are about to sew over them. This will keep the fabric in place but will avoid the risk of hitting one with your sewing machine needle, which could easily break the needle.
- Remember to clip any threads and remove any remaining pins after sewing.
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Trim the outside edge of the seam so you are left with 1 ⁄ 8 inch (0.3 cm) seam allowance. You can use regular scissors or pinking shears, but if you are using a delicate fabric, pinking shears may be best to help prevent excessive fraying. Remember, this seam is not going to show by the time you are finished. Don't worry if the cut edge is a bit frayed or messy. [4] X Research source
- Be sure to use very sharp scissors for this. [5]
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Expert Source
Kpoene Kofi-Bruce
Couture Bridal Designer Expert Interview - While it would be great if you could just sew a 1 ⁄ 8 inch (0.3 cm) seam, and therefore not waste any fabric, most sewing machines need more than 1 ⁄ 8 inch (0.3 cm) of fabric for the machine's feed dogs, the pieces of rough metal under the presser foot, to grab onto and pull along.
- Be sure to use very sharp scissors for this. [5]
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Expert Source
Kpoene Kofi-Bruce
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Iron your first seam. Open the pieces of fabric and lay it out flat on an ironing board. Iron across the seam on both the right side and the wrong side of the fabric so it lays perfectly flat. Then fold the fabric so that the right sides are facing each other (the opposite of how it was when you sewed the first seam). Iron the piece with the seam you just sewed going straight down the outer edge of the fabric. You'll want to iron very carefully and neatly so that the seam on the outer edge is perfectly straight. [6] X Expert Source Kpoene Kofi-Bruce
Couture Bridal Designer Expert Interview- Make sure your iron is set to the correct temperature for the fabric you are using. If it is set to high you will risk singeing the fabric.
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Pin your fabric so that the wrong sides of your fabric are facing out. This should be easy, as you have just ironed them into place. Again, put your pins in horizontally all the way down the side of the seam so that they can be easily removed while you are sewing. The frayed edge should now be concealed between the two pieces of fabric and the outer edge is just the neat row of your first set of stitches. [7] X Research source
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Sew your second seam, this time using a 3 ⁄ 8 inch (1.0 cm) seam allowance. You need this amount of allowance so that the frayed edge of the fabric is tucked away neatly between the two seams. As you sew, remove the pins. Once again, remember to clip threads and remove any stray pins after sewing the seam. [8] X Expert Source Kpoene Kofi-Bruce
Couture Bridal Designer Expert Interview- If your seam allowance is too small on the second seam, the rough edges of the fabric could end up sticking out of the second seam on the finished side of your project. Its better to be cautious and make your seam allowance a bit generous.
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Iron the completed double seam one more time. Press the seam to one side, depending on where you would like it to lay in your finished project. Your raw edges are no longer exposed as they are enclosed inside your newly made French seam. [9] X Expert Source Kpoene Kofi-Bruce
Couture Bridal Designer Expert Interview
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Common Questions: Sewing a French Seam
What are the advantages of a French seam?
French seams hide the raw edges of fabric. On sheer fabrics, they're a subtle way to cover up the seam allowance. They're also used to prevent fraying on the interior of garments. [10] X Research source
What's the difference between a French seam and a flat-felled seam?
In a flat-felled seam, the edges of the fabric are sewn into the seam, just like a French seam. But with a flat-felled seam, the seam is then pressed to lie flat against the garment, then it's stitched into place. A French seam is not stitched down. [11] X Research source
How do you make a French seam on a curved edge?
To sew a curved French seam, turn your fabric wrong-side-in and sew a 3 ⁄ 8 in (0.95 cm) seam along the curve. Trim the excess fabric from your seam allowance, then turn the fabric right-side-in and press it flat. Sew a second 1 ⁄ 4 in (0.64 cm) seam along the curved edge. [12] X Research source
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Tips
- Keep in mind, your actual finished seam allowance will be 5 ⁄ 8 inch (1.6 cm). Check to see what size seam the pattern calls for. You may need to adjust the amount of seam allowance you have before cutting out your pattern.Thanks
- French seams are best for straight edges. They do not work well on curves, such as around the arms and neck of a garment.Thanks
- You may want to practice making French seams on scrap material before trying it on expensive fabric. You can work on making your seams straight and your ironing neat.Thanks
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Things You'll Need
- Sewing machine
- Material
- Matching thread
- Iron
- Ironing board
- Pins
- Scissors
References
- ↑ Kpoene Kofi-Bruce. Couture Bridal Designer. Expert Interview
- ↑ Kpoene Kofi-Bruce. Couture Bridal Designer. Expert Interview
- ↑ https://www.allpeoplequilt.com/how-to-quilt/piecing/what-seam-allowance
- ↑ https://inthefolds.com/blog/2015/9/7/sewing-in-seam-pockets-with-french-seams
- ↑ Kpoene Kofi-Bruce. Couture Bridal Designer. Expert Interview
- ↑ Kpoene Kofi-Bruce. Couture Bridal Designer. Expert Interview
- ↑ https://inthefolds.com/blog/2015/9/7/sewing-in-seam-pockets-with-french-seams
- ↑ Kpoene Kofi-Bruce. Couture Bridal Designer. Expert Interview
- ↑ Kpoene Kofi-Bruce. Couture Bridal Designer. Expert Interview
About This Article
Article Summary
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To sew a French seam, start by pinning the fabric with the wrong sides facing each other and sewing it together using a 1/4 inch seam allowance. Next, trim the outside edge of the seam to about 1/8 inch. Open the fabric so that it lays flat, then fold it over so that the right sides of the fabric are facing each other. After folding it on the seam, iron it so that it’s perfectly straight. Finally, sew the edge again, using a 3/8 inch seam allowance this time. For tips on how to modify an existing pattern to use French seams, read on!
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Reader Success Stories
- "Never heard of a French seam; now I know. The steps are very easy to understand, and I think I'll try it now that I see how it's done. The only thing I'd add is a final pic of a finished piece, seeing how it would be worn or used in bedding, etc." ..." more
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"Never heard of a French seam; now I know. The steps are very easy to understand, and I think I'll try it now that I see how it's done. The only thing I'd add is a final pic of a finished piece, seeing how it would be worn or used in bedding, etc."
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"It has been many years since I have sewn a french seam. This article is great! Easy to understand, whether you're experienced or a beginner. "
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"I never knew-but wondered-why the seam allowance should be bigger before sewing and then trimmed down. Thanks for the explanation!"
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"My Baby Lock serger is having fits, so until I can get it to the store, I'm French seaming so I have finished seams on my sewing."
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"I needed a visual for how a french seam is made. This article showed me everything I needed to make a french seam. Very helpful."
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