Website: https://shop.craftyintentions.com/b/4KvBY
Ravelry: https://www.ravelry.com/patterns/library/doll-add-on-butterfly
Etsy: https://www.etsy.com/listing/4297747882/doll-add-on-butterfly-doll-crochet
You will first need the Doll Body pattern which you can find here:
On my Website: https://shop.craftyintentions.com/b/AFgsD
On Ravelry: https://www.ravelry.com/patterns/library/doll-body-11
On Etsy: https://www.etsy.com/listing/1854676450/doll-body-crochet-pattern-by-crafty