Cute baby cardigan worked from the top down in one piece. The border is worked in my version of the stitch pattern.
You can easily follow the description. The template is presented in PDF format.

Sizes: 6 months - 1-2 years - 3-4 years
To fit chest: 47 (54; 57)cm/ 18 ½(21 ¼; 22 ½)in
Actual chest: 54 (63; 67)cm / 21 ¼(24 ¾; 26 ½)in
Length to neck: 25 (30; 35)cm / 9 ¾(11 ¾; 13 ¾) in
Sleeve seam: 16 (19; 25)cm / 6 ¼ (7 ½; 9 ¾)in

Materials:
Yarn: 116 m 50 g/75% merino, 20% silk, 5% cashmere
Needle: 4 mm round needles 60 cm long

The description is presented in PDF format.
The baby wool cardigan pattern is written in detailed but you must be familiar with basic stitches and techniques such as:

• cast on/cast off;
• how to make knit and purl stitches;
• work flat, in the round/magic loop method.

Qualification level: Intermediate