Gauge; not important, the only important is that you get cables that are nice.
Tip; if you can’t purl with the same gauge as knit, try to change to 0.5 or 1 size smaller needles for the purl. If you have interchangeable needles have a different size tip on each side.
Cast on - make the cast on firm but not to tight.Cast on 44 stitches.
Knit 3 ridges – i.e. all stitches knit for 6 rows.
Knit one more row. Note that all knit rows are all knit except the rows where the cables are made.
Set up for cables: Next row is purl side. Knit 3, (those 3 are knitted as ridges and are knitted on both purl and right side), 10 purl, 1 knit (ridge), 16 purl, 1 knit (ridge), 10 purl, 3 knit (ridge).
Continue these two rows 4 more times (10 rows).
First cable section; Knit 3, place 5 on needle in front of work, knit the next 5, knit from cable needle, knit 18 (mid section + the two stitches on each side), place the next 5 on a needle in back, knit the next 5, knit the 5 from the other needle, finish the row. Knit/purl 9 more rows - as the first two rows.
The 21st row. No cabling is made on the two side panels, only the middle. Place first 6 stitches on a spare needle in front, knit the next 6, knit the 6 from the spare needle, knit the remaining 4 of the mid section, finish row. Knit/purl 9 more rows.
The 31st row. Knit 3, place 5 on spare needle in front, knit the next 5, knit the 5 from spare needle, knit 5 (1 from the bar between and 4 from the mid panel) place the next 6 on spare needle held back, knit the next six, knit the 6 from the spare needle, knit 1, place next 5 on needle held back, knit the next 5 , knit the 5 from the spare needle, knit the remaining 3.
From here - 9 rows between each cable section. Then repeat 21, knit 9 more rows repeat 31, continue as this till the scarf is as long as you want.
Then the last cabling row is a 31 row. The knit /purl 8 more rows stop with a knit row.
Next row knit on the purl row and make 3 ridges. Cast off loosely