Used Drops design’s 253-6 Embrace Winter Neck Warmer (with no collar) as a beginning, and added short rows to shape the front:
1.1.1.2.2.3.4 sts past the front marker

after separating front and back I went on straight in stockinette for 38 rows
added for sleeve every 2 rows :
1x1 st
1x2 sts
1x3 sts

Joined back and front adding 6 sts more for sleeve
went on in st st in the round for 59 rounds striping and 20 rounds in white + 10 rounds 1 by 1 ribbing in white