Follow me for gap-free knitting! No matter how you roll; either on a circular, double points, or straight needles, if you are knitting in the round you should have this little trick in your tool belt. This is a super simple way to get rid of the dreaded gap left when casting off in the round. This gap is between the first and last stitches to be bound off and it's just plain ugly. Employ this little number and you'll never have to see that gap again!
1. Cast off all your stitches as you normally would but keep the last stitch on your needle (do not draw the tail through).
2. Put your needle under the first stitch that you bound off, like if you were going to pick up a stitch there.
3. Pick up a stitch there. You should have two stitches on your needle.