Quick answer: A stretchy bind off adds a yarn over before each bind-off pass, creating a loose, elastic edge that stretches with the fabric — essential for necklines, cuffs, and sock openings.
What it is
A stretchy bind off is any method that creates a more elastic finished edge than the standard bind off. The yarn-over method is the most common: you add a yarn over between stitches as you bind off, creating extra slack in the chain. The result is an edge that stretches and recovers well — crucial anywhere fabric needs to open wide.
When to use it
- Necklines — must stretch over the head
- Sock cuffs — must stretch over the heel
- Cuffs and armhole openings in fitted garments
- Lace bind-off edges where you want the lace points to open fully
How to do it
- Knit the first stitch.
- Bring the yarn to the front (as if to purl) to create a yarn over on the right needle.
- Purl the next stitch — you now have 3 stitches on the right needle: the knit stitch, the yarn over, and the purl stitch.
- Pass the yarn over over the purl stitch and off the needle. Then pass the knit stitch over the purl stitch and off. One stitch bound off, one stitch on right needle.
- Repeat from step 2: yarn over, purl 1, pass both over.
- Continue to the end. Cut yarn and pull through the last loop.
Common mistakes
- Pulling the yarn over tight before passing it over — keep each yarn over deliberately loose
- Confusion about which stitch passes over which — you always pass the two older stitches over the newest one
- Using this bind off where a firm edge is needed — use the standard bind off for shoulders and seams