Quick fix: When weaving in your cast-on tail, use it to sew the gap between the first and last cast-on stitches closed with 1–2 figure-eight stitches. This is the fastest and neatest fix.
What you are seeing
A small hole or gap at the point where you joined your knitting in the round — between the first and last cast-on stitch. It may look like a dropped stitch or a small eyelet. It's especially visible in fine yarn or tight gauge.
Why it happens
- The join between the first and last cast-on stitch is naturally loose unless an overlap or twist technique is used
- Joining in the round without any stitch adjustment leaves a visible gap
- Pulling too firmly at the join can actually enlarge the gap
Fix it now
- Thread the cast-on tail onto a tapestry needle.
- From the inside of the work, insert the needle between the first and last cast-on stitch at the join point.
- Work 1–2 small stitches in a figure-eight to draw the edges of the gap together.
- Weave the tail in as normal — the figure-eight stitches close the hole while also anchoring the tail.
- From the right side, gently push the join stitches together with your fingertip and block to even out.
Prevent it next time
- Use the "knit on cast on" join trick: cast on 1 extra stitch, slip the last stitch to the left needle, then knit the first 2 stitches together as your first round stitch — this closes the gap from the start.
- Or: use a backwards loop cast on for the last stitch, cross first and last stitches before joining.