When you knit a pair of fingerless gloves, the pattern frequently requires you to shape a thumb gusset. The gusset is the section to the right of the increases on a left-hand glove and to the left of the increases on a right-hand glove. At the top of the gusset is the thumb hole. After finishing the gusset increases, you place the thumb hole stitches on a piece of waste yarn and knit the rest of the glove. The last step in finishing the glove is to pick up the live thumb hole stitches, knit them and bind them off.
Untie the waste yarn that holds the stitches at the top of the thumb gusset, and slip the stitches onto three double-pointed needles (DPNs), dividing them evenly and making sure not to twist them.
Holding the needles so that the top of the glove faces you, insert the DPN in your right hand through the first stitch on the needle as if to knit. This stitch would be on the outside edge of your thumb if you were wearing the gloves.
Join the yarn coming off the skein by knitting the first stitch, leaving a 2-inch tail.
Knit across the first DPN and turn the glove to knit across the second. The stitches on the second DPN are the ones that will run between your thumb and hand.
Turn and knit the stitches off the third DPN. These are the stitches on the palm side of the glove.
Continue knitting around until the thumb hole is long enough to meet your knuckle.
Bind off all stitches, break the yarn and weave in the tails with a darning needle.