Joining in the round is a technique used in knitting to create a seamless, circular fabric. It is commonly used to make items such as hats, socks, and sweaters. There are several different ways to join in the round, but the most common method is the “tail method.”
To join in the round using the tail method, first, cast on the desired number of stitches onto a circular needle or two straight needles. Then, knit one round. On the next round, knit the first stitch, and then slip the next stitch onto the left-hand needle without knitting it. Bring the yarn to the back of the work and knit the next stitch. Slip the next stitch onto the left-hand needle without knitting it, and bring the yarn to the front of the work. Repeat this process until you have knit all of the stitches on the round.