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The hook is a wooden or bamboo hook I purchased from a thrift store I believe it’s an M or 9mm hook.
I used a little over two 7 oz skeins of (4) medium worsted weight yarn for a lap blanket.
I do not know how much it will take for something larger.
I learned the technique from this blog which also has suggestions for the number of squares to start with for certain sized ://
Part one of the series.