Stitch Length for Quilting vs Piecing: What’s the Difference?
Have you been using the same stitch length for everything on your sewing machine? It's a very common mistake to make, especially for beginners.
The good news? There's a very simple fix. Once you know the right stitch length for piecing and the right one for quilting, and why they're different, you'll wonder how you ever managed without knowing this!
Let's have a look at what you need to know.
If you'd like to watch my explanation on YouTube (complete with examples under the camera), pop over to YouTube by clicking the image below, and have a watch when you're ready:
What Is Piecing (And Why Does Stitch Length Matter)?
Piecing is when you stitch two pieces of fabric together to make your patchwork. You're creating your pretty patterns and shapes by joining all those fabric squares, rectangles and triangles together, before any of the other layers are added.
For piecing, you need a short stitch length. The magic number is around 2mm or 2.2mm.
Why so small? Because a tight, neat stitch holds your seams together firmly and lies flat when pressed. You won't be able to see individual stitches, and the seam won't pull open at the edges.
What Happens If Your Piecing Stitch Is Too Long?
If you use a longer stitch - say 3.5mm - for your piecing, you'll notice the stitches become visible along the seam. That's not the look we're going for in patchwork!
Even worse? Those longer stitches can start to come apart. You might notice your seam lines opening up at the ends, which is a really frustrating problem that's easy to avoid with the right stitch length.
This is also why, in piecing, we generally don't need to lock stitch at the end of our seam lines.
A 2mm stitch is naturally very secure on its own. Additionally, we go over the stitch line from another direction when we join rows or blocks together, or add borders.
What Stitch Length Should I Use for Quilting?
Now here's where it changes. When you move on to quilting - stitching through all three layers of your quilt sandwich (the top, the wadding, and the backing) - you'll need to increase your stitch length.
A good starting point for quilting is 3.5mm, though you might go slightly lower (around 3mm) or higher (up to 4mm) depending on how thick your wadding is:
A thicker wadding? Go a little longer.
A thinner wadding? You can bring it down slightly.
But 3.5mm is a brilliant, reliable starting point for most quilts.
Why Do You Need a Longer Stitch for Quilting?
There are two brilliant reasons to use a longer stitch when quilting.
• Your machine won't struggle. When you use a short stitch through three thick layers, your machine has to work much harder. The thread can bunch up, pucker the fabric, and the stitches actually end up shorter than you set them because of the resistance. Not ideal, obviously.
• Your quilting lines will look beautiful. Remember, quilting isn't just about holding the layers together, it's also decorative. A longer stitch sits nicely on the surface of your quilt and shows as a proper quilting line. That's exactly what we want.
💖 A third bonus: that longer stitch helps create little pockets of air between the layers, which gives your quilt that gorgeous squishy, snuggly feeling we all love!
Quick Recap: Your Stitch Length Cheat Sheet
Here's a simple summary to keep handy:
• Piecing: 2mm – 2.2mm (short and tight; the stitches hold seams firmly and the seams lay flat)
• Quilting: 3mm – 4mm, usually 3.5mm (longer for smooth, even stitches through all layers)
I do hope that's helped clear things up.
Happy quilting, see you next time!
Kim xx
03/30/2026 17:30:00 +0000
