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I am doing the bigger version of the cardigan on the front for DD1 (it's in Junior Knits), but the pattern doesn't have a button. It fastens with a pin instead. DD however wants a button
I'm wondering how to do the buttonhole. It's a 2x2 rib knitted on circular needles. So I'm guessing it would have to be a sort of vertical hole casting off and casting on again the next row? Going to choose a button today to see what size the hole will need to be.
Any advice?