Beginner needing knitting help

I’m trying to knit a jumper in pieces, I have my front,back and cowl neck just need to do sleeves

gauge 4 stitches per inch

I have this pattern to base my sweater on but it was for a smaller chest size To Fit Bust: 30-31 (33-35, 37-39, 41-43)". But i can’t understand what to do as I don’t read patterns.

Finished Bust Measurement: 32 (36, 40, 44)".

beg : begin(ing)
CA,CB : Color A, ColorB
dec : decrease
inc : increase
K : Knit
mm : millimeters
pat : pattern
rep : repeat
rem : remaining

st(s) : stitch (es)

  • : repeat whatever follows the * as indicated

yo : yarn over

SLEEVES: With CA and larger needles, cast on 22 (23, 24, 25) sts. Work 9 K rows, then pat rows 1-20 same as back AND AT THE SAME TIME shape sides by inc 1 st each end of 8 (8, 4, 4)th row, then every 6th row 7 (8, 9, 9) times – 38 (41, 44, 45) sts. Work even until 15 (16, 17, 17½)" from beg, end wrong side row.

4mm circular needle

I have a 40 inch bust

Got some help on this from a new found friend, I’m now knitting a raglan sleeve but I’m about an inch in and wondering when do I begin knitting the tube part? As previously mentioned my measurements are.

Arm Length 51 cm /20 inches
Top of Arm near shoulder 43cm / 16 & ¾ inches
Arm above elbow 34cm / 13 & ¼ inches
Arm below elbow 29 cm / 11 & ¼ inches
Wrist 17 cm / 6 & ½ inches
Collar to arm pit 8 inches /20cm
Pit to wrist 16 inches/40 cm

If anyone could please tell me how to work out how many inches before I do the tubing, and when and where I should do my decreases I’d greatly appreciate it.

Is there any simple formula like ‘take total arm length divide by 4/6/8/? to find out how many cm’s/inches you need to knit for each section of a raglan sleeve.’?
Like 20 inches/6= 3.33
a)So you’d knit 3.3 inches for the top bit
b)3.3 inches tube
c)3.3 inches first decreases
d)3.3 inches second decreases/second tube
e)3.3 inches third decreases
f)3.3 inches fourth decreases/third tube
for example

I’m also using worksheet. This being my 1st post you’ll have to add the www bit to the front and the (.html) bit to the back
At this point, you may remove the two A markers and continue knitting, always increasing before and after each marker B on every other row. When the raglan equals the raglan measurement, slip the sleeve stitches on to a holder (or a piece of yarn) and remove the B markers. Add one inch of stitches under the arm. Continue knitting a straight tube (or decrease two stitches under the arms every inch or so for a more tightly-fitted sweater) until the desired body length is reached. On the final row before the ribbing, K9,K2tog. Add ribbing of your choice on smaller needles."
Specifically in this bit of that "Add one inch of stitches under the arm. Continue knitting a straight tube " am I right (or wrong) in thinking that this means once I have an inch of material in the underarm section that I can begin knitting the tube? And by tube do they mean just knit no-increase (wrong-side)rows?
In this bit of the ‘knitting’ section "

The directions for the sleeve in the first part of your post are for knitting a sleeve from the wrist up to the armholes.
The directions from the woolworks site that you quote are for a top down sleeve which is knit from the neck to the wrist. After the raglan part and an increase under the arms, the sleeve is knit in the round or as a tube until the wrist, ending with the ribbing. You can either knit this straight with no decreases or decrease as they suggest every few inches for a more fitted sleeve.
I’m not sure which directions you’re following, but I would make the raglan part of the sleeve match the raglan pattern in the front and back which you have already knit. After all, you’re going to have to join the front and back to the sleeves at the raglan slope and so they should line-up.
Check the gauge that you are getting in the front and back. The initial sleeve pattern says 4sts/inch and even for the largest size sleeve (CO 25sts and increase gradually to 45sts) that’s a sleeve that measures only about 11 inches around at the upper arm which is pretty tight.