'Pretend Fair Isle' Jumper

Difficulty:  Intermediate
 
‘Pretend Fair Isle’ jumper is inspired by classic fair isle sweater, but interpreted into a more contemporary way. It is a bell-shaped, oversized cozy snuggly piece.
Jumper is worked from top down in one piece in brioche stitch.
 
SIZES
1 (2) 3
 
MEASUREMENTS
Bust Circumference:  122 (136) 150 cm  [48 (53.5) 59 inches]
Total Length:  68 (70) 72 cm  [26.6 (27.6) 28.3 inches]
 
SUGGESTED NEEDLES
5 mm [US 8] circular needles (60, 80 or 100 cm [24, 32 or 40 inches] )
OR required needle size to obtain gauge
4.5 mm [US 7] circular needles (60, 80 or 100 cm [24, 32 or 40 inches])
4.5 mm [US 7] double-pointed needles (15 cm [6 inches] )
 
GAUGE
In brioche stitch using 5 mm [US 8] needles
12 sts x 38 rows (19 knit stitches in brioche stitch) = 10 x 10 cm [4 x 4 inches]
 
SUGGESTED MATERIALS
Main Color
(500) 550 (650) gr.         
Knitting for Olive, Double Soft Merino, 50 gr. / 110 m - Col. Charcoal Grey
Color A
(50) 50 (50) gr.              
Knitting for Olive, Double Soft Merino, 50 gr. / 110 m - Col. Dove
Color B
(50) 50-100 (100) gr.     
Knitting for Olive, Double Soft Merino, 50 gr. / 110 m - Col. Rose
 
Knit jumper using one strand of main color yarn for every brioche knit round, one strand of colored yarn for every brioche purl round when occurs. Please calculate more meters for main color yarn, if you prefer longer sleeves or body length.
 
Alternatives
Any worsted to aran (10 ply) yarn would be a good choice.