After my first pattern I decided to get a bit more creative! As I’m an avid fan of the CAL for an afghan, I decided to make my own first 12” block.
I suggest you use your preferred hook, for me that’s a 4.0 mm, which means all my blocks are a little bit smaller than the 12”. For the 12” parameters, I suggest you use a 5.0 mm hook with worsted weight yarn.

I hope you enjoy it! Let me know if there need to be any faults fixed :)

Edit: Thanks to bankerlady who pointed out a flaw in the pattern!! Fixed!