We all want to be that kind of knitter who can just pick up her needles and create something amazing without really having to think about it, but that's just not how knitting works. Knitting involves math, unless you're experienced enough to be able to just pull approximately the correct numbers off of the top of your head. Things get even more complicated when you factor different yarn weight categories into the mix. How are you supposed to know how many stitches to cast on for an infinity…
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