One pattern fits all (most)

Moss (Seed) Stitch Coat for slimline fashion dolls

DC Superhero Girls dolls using aran yarn and 4mm needles.
Barbie using DK and 3.5mm
Disney Princess 10.5 inch doll using DK yarn and 3mm
Monster High and Equestria using 2.5mm and 4ply (if you knit tight use 3mm for MH)

ERRATA On back ignore the line “Cast off 5sts at beg next 2 rows” it’s a missprint.