This sweater is easy to make and adaptable to any size.
In this tutorial you will find many pictures (around 100) that will help you during the work.
And also this written pattern has the tutorial for the sweater and for the hat.
Yarn that I use : YarnArt Nordic
Each skein has 150 gr , and 510 m
Crochet nr. 3 mm
I use almost 3 skeins for a 9 year old girl.