Sizes: XS (S) M (L) XL (2XL)
Bust circumference: 80-85 (85-90) 90-95 (95-100) 100-110 (110-120) cm
About the sizes: This vest is designed to have a positive ease of about 15-25 cm. It is included in this design that the positive ease is not the same for the different sizes. Thus, the positive ease will be smaller on the large sizes than on the small sizes. If a tighter fit is wanted, you can drop a size whilst still knitting the vest to the length of your original size.
The measurements:
Length at the centre back (excluding the ribbed neckline): approx. 46 (49) 51 (53) 54 (58) cm
Width where the vest is joined to form the body (underneath the armhole): approx. 49 (52) 53 (56) 60 (63) cm
 
Materials: The vest is knitted in 2 strands - one of each of the following:
Hjertegarn vital (50 grams = 115 meters): 250-300 (300) 300 (350) 400 (400) grams Kid silk mohair (25 grams = 210 meters): 75 (75) 75 (100) 100 (100) grams
 
Gauge: In broken rib stitch; 18 stitches x 33 rows on 4.5 mm needles with one strand of both yarns held together = 10x10 cm after washing and blocking your swatch.
N.B. the broken rib stitch stretches a lot, especially width wise, when it is washed and used. Therefore, it is strongly recommended that you make a gauge swatch and wash it to find out which size knitting needles you need to use to get the right gauge for the pattern.
Recommended needles: 4.5 mm needles (80 or 100 cm) and 4 mm needles (40 and 60 cm)
 
About the vest: The vest is knitted top down in a broken rib stitch. First, you knit the back piece which is created with increases in the bottom to form the armhole. Then the two shoulders are knitted separately before they are joined to form the front piece, which, just as the back piece, has increases to form the armholes. The front and back pieces are joined while you also start making increases and decreases to create the beautiful waist illusion pattern on the front of the vest. At the bottom the vest is separated with slits in each side that splits the vest into ribbed edges at the front and the back. The ribbed edge in the back is made to be a bit longer than the one in the front. Then, stitches are picked up at the armholes and at the neck hole for ribbed edges. All ribbed edges are finished with a tubular bind off.
 
Difficulty: Lower intermediate to intermediate
 
The blue version of the vest is knitted by @Astridank