The full-sized versions of both of these charts are available. Depending on your browser you may need to view the image in a new tab. And they might need some tweaks. I recommend using them for crochet, not knitting, but you can do what you want. I'm not bossy.
And here's some more GoT charts:
Baratheon, Lannister and Stark Sigils
Targaryen, Martell and Tyrell Sigils
Arryn, Clegan, Mormont and Tully Sigils
Littlefinger's Mockingbird Pin - this is a smaller chart that I used to make a custom knit scarf
If you do use any of my charts for projects I'd love to see! I'm serious. I may never get around to do anything with any of these charts, but I think they'd be cool. Facebook!