I originally wrote this pattern for the Kelly doll on the right. She is 4.5 inch (11.43 cm).
The other is the new Chelsea doll. She is 5.5 inch (13.97).
I did not rewrite the hat pattern for the larger Chelsea doll. The dress and hat purse fit both.

Size 7 steel crochet hook (1.65 mm)
Aunt Lydia’s size 10 cotton crochet thread, White 0001, Victory Red 0494
US Stitches Used
Ch/ch………..chain
Sl/sl…………slip stitch
Sc/sc…………single crochet
Dc/ dc……….double crochet
Front Double Crochet around Single Crochet. See here for detailed explanation.
https://www.redheart.com/how-to/articles/ultimate-guide-c...

UK Stitches Used
Ch/ch………..chain
Sl/sl…………slip stitch
Dc/ dc……….double crochet
Tr/tr…………treble crochet
Front Treble Crochet around Double Crochet. See here for detailed explanation. Just follow the Double Crochet around Single Crochet instructions.
https://www.redheart.com/how-to/articles/ultimate-guide-c...