Quick fix: Tink the bind off back to live stitches and redo it using a needle 1 size smaller, holding the working yarn slightly more firmly as you pass each stitch over.
What you are seeing
The bound-off edge at the top of your knitting looks wavy, floppy, or oversized compared to the rows beneath. The chain of bound-off stitches is too large and the edge may flare outward or look untidy in a seam.
Why it happens
- Too much slack in the working yarn between each pass-over
- Using a needle that is too large for binding off a firm edge
- Rushing at the end of a project and letting tension slip
Fix it now
- Tink the bind off: insert the left needle into the stitch below each bound-off stitch and slip back, working in reverse along the row.
- Switch to a needle 1 size smaller and redo the bind off.
- After each stitch is passed over, pull the working stitch snugly before moving to the next.
- For a finished seamed piece: work a row of firm single crochet along the edge to stabilize and tighten it without ripping out.
Prevent it next time
- Bind off on a needle 1 size smaller for non-stretch edges like shoulders and top-down necklines.
- Snug each stitch after passing it over — don't let the chain loosen before moving to the next.