For front and back:
Using finger method, cast on 58 stitches
Commencing in garter stitch (I used the purl method) purl until pieces measures 12”
Using the finger method, cast on 20 stitches
Use garter stitch as above until pieces measure 6”
Fold front and back pieces short ways to find centre and place a pin
Measure 6.5” either side of this pin then pin again at those measurements, these will be the shoulder seams. Try on then adjust if needed.
Once these are sewn fold your sleeves short ways as above and pin for the centre.
Place centre pin to shoulder seam, pin then sew. Do the same for other sleeve.
Place front and back together and sew side seams.