At this point, it's a great idea to try on your sweater. Pull it carefully over your head. If your circular needle isn't long enough to allow the sweater to rest against your arms & body then move some stitches to a spare circular needle or to a piece of waste yarn. Try pinching the armpit points together so they meet under your arms. Bear in mind that you will be adding 13 stitches under each arm when you separate the sleeves, so try to hold the underarm points with a gap of about 7.4cm between them. If you think it's too tight, do a few more raglan increase rounds. If you think it's too big, step backwards by frogging a few rounds.
On the next round (round 43): knit to the first sleeve marker, remove the marker and put the sleeve stitches on a holder. Use the knitted cast-on method to cast on 6, place a marker, use the knitted cast-on method to cast on 7. Join up to the stitches on the other side of the sleeve stitches and keep knitting. Repeat in reverse when you reach the next sleeve: cast on 7, place a marker, then cast on 6. Knit to the end of the round (41, 84, 41)
Work in stocking stitch for 98 rows in total, following instructions and adjustments below:
After row 141, work in k1p1 rib for 2.8cm.
Bind off in rib pattern and weave in ends.
Reset your row counter to zero - sleeve row counts will be given counting from the first sleeve round as round 1.
Put the live stitches for the left sleeve onto a circular needle. With the right needle tip, pick up and knit 6 stitches between the center of the underarm and the first stitch on the needle. Work across the stitches on the needle, then pick up and knit 7 stitches between the last stitch on the needle and the center of the underarm. Place a marker, join here and begin working in the round.
Work in stocking stitch for 104 rows in total, following instructions and adjustments below:
At the same time, on rows 1, 7, 13, 19, 25, 32, 38, 44, 50 : decrease by 1 stitch either side of the center marker.
At the same time, on rows 53 : decrease by 0 stitches before the center marker, and 1 stitch after the center marker.
At the same time, on rows 56, 62, 68, 74, 81, 87, 93, 99 : decrease by 1 stitch either side of the center marker.
Now is a great time to try on your sweater again and check the sleeve length. If your sleeve is too short, add a few more rounds before knitting the final ribbing. If it's too long, frog a few rounds before knitting the final ribbing. In either case, make a note so you remember to make the same adjustment to the second sleeve. Work k1p1 rib for 2.8cm. Bind off. Repeat for the other sleeve.