This is a pattern for a knitted jumper worked using the stranded colourwork technique. It is worked from the bottom up and in the round with steeks (armscye, front & back neck). The sleeves are then picked up and worked from the top down.
Finished sizes are determined by stitch gauge.

This pattern is intended for the experienced knitter who is comfortable with charts, extending patterning over shaping, and steeking. If you are a less experienced knitter and would like to knit this or my other projects and enjoy more personal attention and knitting assistance, please consider becoming one of my Patreon members.

There are 3 body charts and 2 sleeve charts (one for left and one for right). You may work them as suggested or mix and match (as you may have seen in some of the test knitter projects).
Also included are instructions and links for steeking plus instructions for the Ladderback/Invisible Jacquard technique, if you would like to use this technique over the areas with long floats. The yarn amounts take account some size adjustments, I recommend increasing yarn amounts by 10% for larger adjustments.

yarn:
2 Ply Jumper Weight by Jamieson & Smith; Fingering; 100% Shetland; 125yds (115m)/ 25g
approximate yarn amounts:
If using gauge of 26 sts x 34 rows
colour A (134) - 179 (238, 298, 357) g / 895 (1190, 1490, 1785) yds / 819 (1089, 1363, 1633) m
colour B (FC24) - 138 (183, 229, 275) g / 690 (915, 1145, 1375) yds / 631 (837, 1047, 1258) m
If using gauge of 28 sts x 36 rows
colour A - 197 (262, 328, 393) g / 985 (1310, 1640, 1965) yds / 901 (1198, 1500, 1797) m
colour B - 152 (202, 253, 303) g / 760 (1010, 1265, 1515) yds / 695 (924, 1157, 1386) m
If using gauge of 30 sts x 38 rows
colour A - 217 (289, 361, 434) g / 1085 (1445, 1805, 2170) yds / 993 (1322, 1651, 1985) m
colour B - 168 (223, 278, 335) g / 840 (1115, 1490, 1675) yds / 769 (1020, 1363, 1532) m
needles:
2.75mm (us no 2) circular 40in/101cm
3.25mm (us no 3) circular 40in/101cm
OR
2.5mm (us no 1.5) circular 40in/101cm
3.0mm (us no 2.5) circular 40in/101cm
OR
2.25mm (us no 1) circular 40in/101cm
2.75mm (us no 2) circular 40in/101cm
(plus appropriate sized DPNs for sleeves if preferred)
gauge: 26 (28, 30) sts x 34 (36, 38) rows = 4in/10cm
measured over patterning
Some knitters work stranded and single-coloured at different gauges. Change needles, as needed, to keep gauge the same throughout.
approximate finished size:
1 (2, 3, 4) - size is determined by stitch gauge
26 st gauge
31.75 (42.5, 53, 63.5) in / 80.5 (108, 134.5, 161) cm
28 st gauge
29.5 (39.5, 49.25, 59) in / 75 (100.5, 125, 150) cm
30 st gauge
27.5 (36.75, 46, 55) in / 70 (93.5, 117, 140) cm
additional tools: needle to weave in ends, st markers, st holders, crochet hook and waste yarn for steeking, safety pins if desired for sleeve shaping