I used worsted weight yarn and US 5 needles.
You need just over 50gms of yarn.
I also found that knitting them both at the same times ensures that they bout turn out the same !
Cast on 42 sts
Knit 20 rows in k2 p2 rib
on the 20th row place markers this way:
k20 place marker, k2, place marker, k20
the 2 sts between the markers will form the increase for the thumb.
Switch to stocking stitch (1 row K - right side- 1 row P - wrong side)
Knit to marker, (20 sts)
knit twice in the next stitch and in the one after that (the sts between the markers)
next row and all wrong side rows, Purl
Knit 20 sts (you have reached the marker)
knit twice in next stitch, K2 (till next marker) and K twice in the stitch before the marker
Continue this way, always increasing a stitch at each marker till you have 16sts between the markers.
k 2 rows then with right side facing, k20, CO 16, k20 (shaping the thumb)
next row, (W side) knit 19sts, K 2 tog, K till end
next row - K 18 sts, k 2 tog, k till end
you should now have 38 sts total.
K 6 more rows
K 6 rows in K2P2 rib
Sew up the side and there you go!!
You can spruce up this basic pattern by cabling the rib, adding bobbles, stripes etc etc