How to find the right size for you?
Measure around your chest and add the number of cm you want for the desired range of motion. To get the right width for my use, I usually measure around your chest and add 10 cm. This will give you plenty of room for wool underwear and the sweater will fit well. Remember that the stated measurement is only achieved by following the given knitting tension The length of the sweater is standardized, so you can use this to measure the length of a garment that you think fits well and adjust it to your body.
NOTE: needle size is only a guide. If you get more stitches than stated in 10 cm, go up one needle size. If you get fewer stitches than stated in 10 cm, go down one needle size. Pay attention to the knitting tension in the pattern. Remember that many people knit tighter in patterns than in solid color stockinette stitch. If you measure knitting tension on solid-colored stocking stitch, you should measure again on the pattern, and possibly change Pinne if necessary.