I made up the pattern- he has a wrist circumference of 5 1/2”.

5 sts=1”

CO 28 sts onto double points and join in the round.
1x1 rib for 6 rounds.
st st until piece measures 2” from CO edge.
Thumb: K14, (m1)2x, k14
Next Round: k1 round
Next Round: K14, m1, k2, m1, k14

cont to inc 2 sts every other round until 10 sts are inc’d.
work 1 round even without inc, and p across the 10 thumb sts.
BO the thumb sts on the next round
work 2-3 rounds plain k.
work 4 rounds in 1x1 rib and BO in rib on next round.