Here are the things you will need:
- One old sweatshirt, the biggest you can find. It doesn’t even matter if it’s stained.
- Scissors.
- A ruler
- A bit of cardboard
Source: http://www.curbly.com/users/diy-maven/posts/2548-how-to-turn-an-old-sweatshirt-into-a-no-sew-cuddly-pet-blanket
