To make this cardigan

I used a 4.5mm hook and 8x 100g balls of King Cole Cherish Baby Double Knitting,
1 x100g ball of brown double knit yarn,
1 x 100g ball of yellow yarn

See how to crochet the Sunflower Granny Square and Half Square on my website. Free with ADs

Or you can buy the AD free pdf from Ravelry