This is a pig applique and you can sew it on anything you prefer.Hat,sweater,T-shirt,bag.
You can use any type of yarn you like (I used cotton yarn)
Any size of crochet hook that is right for your yarn (I used 2.5
mm crochet hook)
The size of the applique is not important.
You don’t need to use a lot of yarn for this project you can always use your scrap yarn.