Hi! This is an easy model for an Infinity scarf.
It’s all knit no purl.
3 rows with 4.5 mm needles.
10 rows with 10 mm needles.
It’s the change between both size of needles that make the pattern. I change it 11 times. (It can be only 10 for a normal size person).
Be carefull to begin the needles change on the same side of the scarf to be sure that it’s equal.
At the end, you finish with the 10mm needles pattern. You make 1 row with the 4.5mm needle. Then, you cut a long tread and you can sew it with the beginning.
If you are more advance, you can knit together the last row and the begin row and finish it at the same time by passing the stitch over the last one to close the row while knitting. (well, maybe I’m not clear on that one).
It’s a pretty quick project. Have fun and show me your pic if you do it!