Thank you Kay for sharing with us..
Size for 12 year old or so, depending on how tight you knit and if you use double yarn.
Cast on 34 stitches on a size 6 needle.
Work 2 - 2 ½ inches of ribbing (for cuff) using k1, p1.
Begin the hand: Row 1 & 3: knit. Row 2 and even rows: purl.
Row 5 (beginning thumb): k 16, increase 1 stitch in each of the next 2 stitches, k 16.
Row 7: k 16, inc 1 st in the next st, *k 2, inc 1 st in the next st, k 16.
Row 9: like Row 7, but k 4 between the increase stitches.
Row 11: like Row 7, but k 6 .
Row 13: like Row 7, but k 8 .
Row 15: like Row 7, but k 10 .
Row 17: like Row 7, but k 12 .
Row 19: k 31, put remaining st (17) on stitch holder.
Row 20: p 14, put remaining st (17) on stitch holder.
Knit a Row, purl back until thumb is desired length, k 2 together to "gather" on last Row. Cut yarn about 12 inches, use a needle to sew up the side of thumb.
Put the stitches from the stitch holders back onto the two knitting needles. When you reattach the yarn, create a new stitch at the base of the thumb. I always wait a couple rows to knot the attached yarn so I don't get a hole at the base of the thumb. Finish knitting across, purl back. Continue until the mitten is desired length. K 2 tog at the top, probable twice so you have about 8 stitches left. Cut yarn, sew up side of mitten with a needle.