This pattern was originally made for Viggo, one of the Tinies made by lillim (lillim.com) but the model is a unisex sweater that will suit many doll body shapes.
You can use any cotton 16/2 yarn.

The Yellow/White version is made by Linen 16/1 and the dark purple/grey version is made by woll/acrylic, Svarta Fåret Merilla

Dimensions in mm:
From sleeve edge to sleeve edge 185
From shoulder to bottom edge 70
Sleeve circumference at hand 30
Sleeve circumference at armpit 50
Width 120
Neckline between shoulders 25