https://jordanfabrics.com/pages/stri...-cabin-pattern
I like this tutorial. She has a YouTube video for it too. She uses one jelly roll for a 3x4 layout of 14.5” unfinished blocks. For a king size, I would do 8x8 for 112” square, which would be 6 jelly rolls, with quite a bit left over. Then you can use the extra strips for a scrappy binding.