You will need 5 x 2.5mm dpns or 2.5mm circular needle, 3 markers, 40g of sock yarn (approx. 160 meters for a pair)
To fit palm circumference of 8” or 20cms, measured above the thumb joint
Gauge: 28 sts x 32 rows in stocking stitch over 10cms x 10 cms
M1: pick up the bar between the worked stitch and next stitch, and knit into the back of it. This method avoids holes in the work.
Using a stretchy cast on, cast on 60 stitches and put 20 stitches on each dpn. If you like, place a marker after the first stitch so you know when the start of each round is. This also helps line up the rib at the top of the mitten.
Rib pattern: K3, p2, repeat until end of round
Work 30 rounds in rib.
Thumb gusset of mitten:
Row 1: Knit 21, place marker, M1, place marker, knit to end of round
Row 2: knit
Row 3: knit 21, slip marker, M1, k1, M1, slip marker, knit to end of round
Row 4: knit
Row 5: knit 21, slip marker, M1, k3, M1, slip marker, knit to end of round
Row 6: knit
Row 7: knit 21, slip marker, M1, k5, M1, slip marker, k1. Place the remaining stitches on another dpn to accommodate the increasing thumb gusset stitches, knit to end.
Continue in this way, on 4 needles, until there are 23 stitches between the markers. 24 rounds should have been completed.
Body of Mitten:
Row 25: knit 21 sts, remove marker, place 23 stitches between the markers on a piece of contrasting yarn, remove marker, knit to end. There should be 60 stitches now, which can be put back onto 3 dpns again.
Knit 10 further rows (35 rows from end of rib)
Then work 10 rows in the rib pattern as before. Cast off in rib, picking up the two loops of the first stitch cast off, to cast off the last stitch. This avoids a hole in the last cast off stitch. Break yarn.
Re-join the yarn at the base of the thumb, leaving a tail of about 10” for closing any holes formed when picking up 2 stitches.
Pick up 10 stitches from the contrasting yarn onto the 1st dpn, then 5 stitches onto the 2nd dpn, then the remaining 8 stitches onto the 3rd dpn, pick up two stitches from the gap at the base of the thumb, making 10 sts on the 3rd dpn. Work 6 rows k3,p2 rib. Cast off using the method stated on the mitten body section.
Sew in ends.