[Scandic ノルディック・ミトン] P. 59 Instructions for thumbs
After mitten is complete remove waste yarn and place 11 sts onto needles, pick up 11 sts from CO and one st in each thumb corner, 24 sts total. knit in St st for approximately 2”. If using dpns: K12, PM, K to end. *SSK, K to 2 sts before M, K2tog; repeat from * . 4 sts decreased. Repeat decrease round 3 more times, 8 sts remaining. Pull tightly to close. (If using 2 24” circulars distribute sts evenly, no need for st markers as decreases occur at beg and end of needle.)