If your T-shirt hem skips stitches, the needle is almost always the problem, not the machine. But buying ‘a knit needle’ is not enough, because there are two of them and they do different jobs.
The short answer: a ballpoint needle is for knits that do not stretch much. A stretch needle is for knits with lycra, spandex, or elastane in them. Get that one choice wrong and the skipped stitches stay, no matter how many times you rethread.
If you are not sure which kind of knit you have, use the ballpoint or stretch needle selector. Put in the fabric and how much it stretches, and it picks the type and size together.
The one test that decides it
Stretch the fabric and let go. If it springs back, there is elastic fibre in it. Check the label too: any mention of lycra, spandex, or elastane means stretch needle, even if it is only a small percentage.
No spring-back, no elastic on the label, and the fabric is a plain cotton jersey or sweatshirt fleece? That is a stable knit. Ballpoint is the right needle.
This is the whole decision. Everything else is size.
What each needle actually does
A ballpoint needle has a rounded tip. Instead of cutting through the knit loops, it slips between them. That is why a stable jersey sews cleanly with it and why it does not leave little holes in the fabric.
A stretch needle is built for elastic knits. It has a special scarf that stops skipped stitches on fabric that moves and snaps back under the needle. The exact thing a ballpoint cannot handle once lycra is in the mix. On a high-stretch knit, a ballpoint will sew some stitches and miss others, and the seam looks fine until you stretch it and the gaps show.
Neither one is ‘better.’ They are for different fabrics.
Side by side
| Ballpoint / Jersey | Stretch | |
|---|---|---|
| Point | Rounded, slips between knit loops | Made for elastic knits, with a scarf that stops skipped stitches |
| Best for | Cotton jersey, stable jersey, sweatshirt fleece with no elastic | T-shirts with lycra, leggings, activewear, dancewear |
| Light fabric | 75/11 | 75/11 |
| Medium fabric | 80/12 | 75/11 |
| Heavy fabric | 90/14 | 90/14 |
| Fails when | The knit has lycra or spandex in it | Almost never on a knit. It is just more than a stable knit needs |
Sizes above match the Needle Selector: ballpoint runs 75, 80, 90 by fabric weight, stretch runs 75, 75, 90. The European number comes first, the American number second. 75/11, 80/12, 90/14.
One naming trap: Schmetz calls it Ballpoint / Jersey, Organ calls it Jersey / Ballpoint. Same job, different pack label. Go by the brand you actually own.
Swimwear is a third case
Swimwear and very elastic fabric are past what a standard stretch needle handles happily. For those, the selector gives a Super Stretch needle. Same sizes as stretch (75/11 light, 75/11 medium, 90/14 heavy), but a different needle type made for the highest-stretch fabrics. If you are sewing swimsuits, leotards, or anything that has to stretch hard and snap back every time, do not stop at stretch.
Three mistakes that keep the skipping going
- Using a universal needle on jersey. A universal has a slightly rounded point, but it is a woven needle at heart. On a knit it cuts loops instead of slipping between them, and the stitches skip or the fabric gets tiny holes. Switching to the right knit needle fixes more jersey problems than any tension change.
- Using a ballpoint on leggings. This is the most common version of the mistake. The fabric looks like jersey, so a ballpoint feels right, but the lycra inside is what makes the stitches skip. If the label says elastane, the ballpoint was never the right needle.
- Keeping an old needle in and blaming the new one. Needles dull quietly. If you fitted a fresh stretch needle and it still skips, check that the old ballpoint is actually out of the machine, and that the fabric is not a woven being sewn like a knit. A fresh needle first, then blame something else.
Quick answers
Can I just use a stretch needle for everything knit? It will usually sew a stable jersey fine. It just costs more and buys you nothing there. Ballpoint is cheaper and is the right tool for a knit with no elastic in it.
Can a ballpoint needle sew woven fabric? No, not well. The rounded point pushes woven yarns apart instead of piercing them cleanly, so stitches skip and seams pucker. Woven fabric wants a universal or a sharp needle, not a knit needle.
Why does my jersey sew fine on straight seams but skip on hems? Hems cross more layers and more stretch, so the needle has to work harder. That is where the wrong type shows up first. A fresh needle of the right type, in the right size, is the first fix.
What size should I start with? For most T-shirts and jersey tops, 75/11. For heavier sweatshirt fleece or layered hems, 80/12 ballpoint or 90/14 if the fabric is thick. If you sew swimwear or high-stretch fabric, check the swimwear and high-stretch setting in the selector before you buy. Super Stretch is a different needle, not just a bigger size.