The Otto Sweater Baby is worked from the top down in a stripe pattern. First, the back yoke is worked. Next, each shoulder is worked separately and back and forth on the circular needle. These are then joined to form the front yoke. The front and back yoke are then joined to form the body which is worked in the round on the circular needle. The sleeves are worked from stitches that are picked up and knitted along the armhole openings. The folded neck edge is worked at the end from stitches that are picked up and knitted around the neck opening.

Schematics can be found here.

Sizes:
0-3 months (3-6 months) 6-9 months (9-12 months) 1-2 years (2-3 years) 3-4 years

Chest circumference:
50 (56) 62 (65) 67 (69) 73 cm
[19¾ (22) 24½ (25½) 26½ (27¼) 28¾ inches]

Length:
28 (30) 33 (35) 36 (39) 42 cm
[11 (11¾) 13 (13¾) 14¼ (15¼) 16½ inches] measured mid back excl. neck edge

Gauge:
28 sts x 42 rows = 10 x 10 cm [4 x 4 inches] in stockinette stitch on a 3 mm [US2½] needle

Needles:
Circular needles: 3 mm [US2½] / 40 or 60 cm [16 or 24 inches] and 2.5 mm [US1½] / 40 and 60 cm [16 and 24 inches];
Double-pointed needles: 2.5 mm [US1½] and 3 mm [US2½]
(unless you use the Magic Loop technique)

Materials:
Main color: 48 (52) 62 (66) 74 (82) 90 g Sunday by Sandnes Garn (50 g = 235 m [257 yds])
or Merino by Knitting for Olive (50 g = 250 m [273 yds])

Stripe color: 34 (37) 43 (50) 56 (65) 72 g Sunday by Sandnes Garn (50 g = 235 m [257 yds])
or Merino by Knitting for Olive (50 g = 250 m [273 yds])

Difficulty: ★ ★ ★ (3 out of 5)

See the classification of difficulty here.

The burgundy and green Otto Sweater Baby is knitted in Sunday by Sandnes Garn in the colors Burgundy [4372] and Lys chinos grøn [9822].

The brown and white Otto Sweater Baby is knitted in Sunday by Sandnes Garn in the colors Cacao nibs [3091] and Almond [2511].