How can I effectively block yarn to achieve the desired shape and size for my project?

To effectively block yarn for your project, follow these steps:

1. Soak the finished project in lukewarm water with a gentle detergent.
2. Gently squeeze out excess water without wringing.
3. Lay the project flat on a blocking mat or towel in the desired shape and size.
4. Use rust-proof pins to secure the edges and corners.
5. Leave the project to dry completely before unpinning.