Long-Tail Cast-On (Thumb Method)
The most popular method for casting on new stitches, worked from a single tail of yarn to produce a durable, moderately elastic edge that suits almost any project.
Explanation
The Long-Tail Cast-On (also known as double cast-on or thumb method) is the most widely used cast-on method. It uses a long tail of yarn along with the working yarn, forming stitches by looping around the thumb and index finger. It provides a neat and stretchy edge suitable for almost any garment. To avoid a tight cast-on edge with this method, you can cast on holding two needles together or use a larger needle size.
Also known as: Long-tail, Double cast-on, Continental cast-on
How to work the long-tail cast-on
Measure a tail long enough for the whole cast-on, make a loop on the needle, and hold both strands in your left hand over thumb and index finger. Bring the needle up through the loop on your thumb, catch the yarn from your index finger, and draw it back through. Snug it gently.
The method creates the cast-on and the first row at once, which is why the edge comes out both tidy and sturdy. Allow roughly three times the width of the piece for the tail, plus a margin.
When to choose something else
The edge is moderately elastic and suits most projects, but for ribbing that needs real stretch the Italian cast-on is better. If the stitches will be picked up again later, use a provisional cast-on.
For armholes and buttonholes mid-fabric, where you need new stitches without a free tail, the backward loop cast-on is simpler.
Common mistakes
- Underestimating the tail and running out just before the last stitch.
- Snugging each stitch hard, so the edge will not stretch.
- Counting — or forgetting to count — the initial slip knot as a stitch.
Keywords
- long tail cast on
- cast on
- thumb method
- slingshot cast on
Frequently asked questions
How long a tail do I need?
About three times the width you are casting on, plus extra. For 100 stitches on a US 6 (4 mm) needle the width is around 18 inches, so allow about 60 inches to be safe.
Is the long-tail cast-on the same as the thumb method?
Yes. Both names describe the same technique, sometimes also called the double or Continental cast-on.