This drop shoulder sweater is worked top-down.
Front and back panels are worked flat separately then joined in the round under armholes. Sleeve caps are formed by short rows.

This pattern also explains how to make a vest version.

Size Measurements (S, M, L):
Bust: (115cm/45.3”, 125cm/49.2”, 136cm/53.5”)
Upper arm: (40cm/15.7”, 44cm/17.3”, 46cm/18.1”)
Recommended ease: 10cm/3.94” to 30cm/11.8”
Sample shown in size M with 30cm positive ease.

Yarn:
DK weight
Sweater (1315m/1438yards, 1440m/1575yards, 1565m/1712yards)
Vest (840m/919yards, 914m/1000yards, 995m/1088yards)

Needles and Tools:
3.5mm and 3.75mm 60cm/24” or 80cm/32” circular needle
3.5mm and 3.75 mm DPNs or short circular needles (for sleeves)
3.5mm 40cm circular needle (for neckband)
Stitch markers and tapestry needle
Stitch holders or waste yarns

Gauge:
22 sts & 30 rows = 10cm/4” in Stockinette Stitch on 3.75mm needle after blocking