I've been spending a lot of time lately playing around with wonderfil spagetti thread on my longarm, and the results are honestly pretty striking compared to the thinner stuff I usually use. If you've ever felt like your quilting just kind of blends into the background, switching to a heavier weight thread like this might be exactly what you need to give your projects some actual personality.
It's a 12-weight, double-gassed Egyptian cotton, which basically means it's thick, smooth, and has a very matte finish. Because it's so substantial, it creates a look that mimics hand-stitching but with the speed of a machine. But before you just jam it into your machine and start sewing at top speed, there are a few things you should know about how it behaves.
Why 12-Weight Cotton is a Game Changer
Most of us are used to using 40-weight or 50-weight threads for our everyday piecing and quilting. They're great because they disappear into the seam. But wonderfil spagetti thread is the complete opposite of that—it wants to be seen. Since it's a 12-weight, it's much thicker. When you look at a quilt finished with this, the stitches don't just sit there; they pop off the surface of the fabric.
I love using it for "big stitch" quilting. You know that look where the stitches are deliberate and bold? You can get that look on a sewing machine without having to spend weeks doing it by hand. It gives a project a very rustic, artisanal feel that's hard to achieve with standard thread. Plus, since it's low-lint due to the double-gassing process, you won't find your bobbin case filled with "thread fluff" after five minutes of sewing.
Setting Up Your Machine for Success
You can't just treat this like your standard polyester thread. If you try to run wonderfil spagetti thread through a tiny needle, you're going to have a bad time. The thread will shred, it'll snap, and you'll probably end up wanting to throw your machine out the window.
The first thing you need to do is swap out your needle. I usually go for a size 90/14 or even a 100/16 Topstitch needle. The Topstitch needle is key here because it has a much larger eye and a deeper groove along the side. This gives the thick thread room to move without getting caught or creating too much friction. If the eye is too small, the thread will literally strip its outer layers as it passes through, leading to a huge mess.
Tension is the next thing to tackle. Because the thread is so thick, it's going to pull harder. I almost always have to loosen my top tension quite a bit. It's a bit of a trial-and-error process. I usually grab a scrap piece of the same fabric and batting I'm using for my project and run a few test lines. If you see the bobbin thread pulling up to the top, your top tension is still too tight.
What to Put in the Bobbin
One question I get a lot is whether you should use wonderfil spagetti thread in the bobbin as well as the top. You can, but it's often overkill. Unless you're doing a reversible project where you want that thick look on both sides, I'd suggest using something much thinner in the bobbin.
I usually pair it with a 60-weight or 80-weight polyester or cotton thread in the bobbin. This helps the machine form a stitch more easily and prevents the bobbin case from getting too crowded. If you put 12-weight in both the top and the bottom, you're going to run out of bobbin thread every five minutes, which is just annoying. Using a thinner bobbin thread also helps the thick top thread lay flatter against the quilt top.
Where This Thread Really Shines
While I use it a lot for machine quilting, wonderfil spagetti thread is also fantastic for other crafts. If you're into embroidery or redwork, this stuff is a dream. It gives you a lot of coverage very quickly. One pass of a decorative stitch looks like three passes with a thinner thread.
I've also used it for garment sewing—specifically for topstitching on denim or heavy canvas. If you're making a pair of jeans or a tote bag, using this thread for the visible seams gives it that professional, heavy-duty look. It's also great for "sashiko" style stitching. While traditional sashiko is done by hand, you can mimic the aesthetic on your machine by using a long stitch length and a contrasting color of this thread.
Variegated vs. Solid Colors
One of the coolest things about this specific line is the color variety. They have solids, of course, but the variegated options are where things get interesting. Because the thread is thick, you can actually see the color changes much more clearly than you would on a thinner strand.
I recently used a variegated blue and green spool on a beach-themed quilt, and it looked like moving water. The transitions are usually pretty subtle, so you don't get that "stripey" look that some cheap variegated threads produce. It's more of a gentle blend that adds a layer of depth to your quilting lines.
Dealing with Lint and Maintenance
Even though I mentioned it's low-lint, "low" doesn't mean "none." When you're working with 100% cotton, especially a thicker one, you're still going to get some buildup. If you're doing a large project with wonderfil spagetti thread, make it a habit to stop every couple of bobbin changes and brush out your bobbin area.
A little drop of oil (if your machine requires it) can also go a long way. Thick thread creates a bit more heat and friction as it moves through the tension discs and the hook assembly. Keeping things clean and lubricated will save you from a lot of skipped stitches and frustration.
Using a Thread Stand
If you find that your thread is twisting or kinking as it comes off the spool, it might be because of how it's being fed into the machine. Most 12-weight spools are a bit larger or wound differently than standard spools. I highly recommend using a standalone thread stand that sits behind your machine.
This allows the thread to pull vertically off the spool and gives it a bit more "travel time" to straighten out before it hits the tension discs. It's a small adjustment, but it makes a massive difference in how smoothly the thread flows, especially when you're sewing at a decent clip.
Final Thoughts on the Bold Look
At the end of the day, using wonderfil spagetti thread is about making a statement. It's not for every project—sometimes you want your stitches to be invisible—but when you want the quilting to be the star of the show, this is the way to go. It's tactile, it's bold, and it feels high-quality under your fingers.
If you've been hesitant to try thicker threads because you're worried about your machine settings, just take it slow. Get the right needle, loosen that tension, and do some tests. Once you see that thick, beautiful stitch pattern on your fabric, you probably won't want to go back to the thin stuff for your decorative finishing. It just adds a level of "wow" factor that you can't get any other way.