Best Sewing Machine Settings for Underwear: Save Your Nerves and Your Lace!
Hi! I just want to introduce myself if it is your first time here. My name is Alyona and I have been sewing as far as I can remember. For the past 10 years, I have been absolutely mad about sewing underwear, and I just want to share some tips that will save your nerves, your fabric, and your precious time. I really wish an article like this existed when I started – but unfortunately, I was less lucky than you.
By the end of this article, you will know exactly how to set up your machine so it behaves every single time you hit that pedal to the floor.
The Struggle: When Your Machine Decides to Speak a Different Language
I bet you have been there. You are trying to sew your gorgeous new knickers, and on a scrap of fabric, the stitches look okay. Then you take your fabulous, precious project – the one you spent ages cutting and pinning – and you start to sew.
Suddenly, everything is squeezed! You have a mountain of thread loops on the bottom, or your stitches are skipping like they are playing hopscotch. Basically, you need to rip it all out. But because you are working with delicate fabric, you end up spoiling the material, your money is gone, and you feel totally helpless. It is like your machine just does not want to speak the same language as you 🙄.+1
Believe me, I have been there multiple times. I tested every setting, needle, and thread under the sun before I found the “magic formula” that saves my butt every time I sew.
If you are new, you have probably seen those 10,000 dials and buttons and thought – “God, I need a diploma just to understand this beast!” But no, it is actually just three simple settings you need to remember.
Setting 1: Thread Tension – Keep It Simple
First of all, let’s make it easy. We are talking about thread tension. When it comes to underwear, do not even bother overcomplicating it. I am not going to bore you with “if you use this specific light fabric, do this” – let’s just cut all the fluff and get straight to the point.
When you sew underwear – whether it is polyester, delicate lace, net, or mesh – just put your tension between 3 and 4. Simple as that. This setting will work every single time for these fabrics.
Setting 2: The Elastic Stitch (The “Multi-Step” Hero)
Usually, there are two types of stitches you will use for underwear. The tension stays the same (3 – 4) for both, which is why we settled that first!
I use the elastic stitch (the one that looks like a zigzag made of tiny steps) for finishing off my projects – usually for sewing on picot elastic or fold-over elastic (FOE).
- Width: Let’s look at 1.5 cm fold-over elastic – the standard stuff everyone uses. When you fold it, you have about 0.7 cm of width. You do not want to set your stitch width to the maximum (like 7), because if you stretch the elastic even a tiny bit too much, the needle will jump right off onto the fabric.
- The Sweet Spot: I set my width to 6. This gives you a tiny bit of space at the edges so your stitch goes perfectly in the middle but still grabs everything.
- Length: This defines the space of those small steps inside the big zigzag. My setting is always 3. In my opinion, it is the most perfect length.
I have used these settings for my entire underwear-sewing career and I never change them! If I use a wider elastic, like a 12mm Picot Elastic, I might bump the width up to 7, but 6 is my reliable standard.
Setting 3: The Zigzag Stitch (For Straps and Drama)
Next, we have the classic zigzag. I use this for bra straps, side straps on knickers, or blocking side seams.
- Width: I use 3. Visually, it is the cleanest look for straps. I do not use zigzag for leg holes or waistbands (I prefer the elastic stitch there), but for straps, zigzag is fantastic.
- Length: I put this on 2. This is the “depth” of the step. If you put it to the minimum, your machine will just stitch in one place like it is trying to attach a button – total disaster. If you max it out, your “triangles” will look stretched and ugly.
- The Verdict: Setting 2 gives you that professional, beautiful look we all want.
A Cheeky Little Secret for Straight Stitches
Now, I also use a straight stitch sometimes. But wait – if you use a normal straight stitch on stretchy undies, it will snap the second you try to pull them over your hips. Absolute nightmare!
However, I found a perfect way to make a straight stitch actually elastic. It is honestly mind-blowing. I remember thinking, “Oh my God, where have these settings been all my life?!”
If you want to stop your threads from snapping, you definitely need to see: How to Make a Straight Stitch Elastic for Underwear.
Summary of My “Magic” Settings:
- Tension: 3 – 4 (Always!)
- Elastic Stitch: Width 6 / Length 3
- Zigzag Stitch: Width 3 / Length 2
Stop wrestling with your machine and give these a go! If you want to see these stitches in action, check out my YouTube Channel where I spill all the secrets.
So, if you are feeling brave and want to actually practice with these settings instead of just nodding along, go on and grab this free panty sewing pattern. Using this free sewing pattern is the absolute best way to practice these settings and build something better than a pile of tangled thread! It is the perfect way to show your sewing machine who is really the boss. I promise, once you see those perfect stitches on your own project, you will never look back.
See you in the next article! Bye!
