Find the Hole and Look at the Broken Knit Loops
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Spread the sweater out flat with the damage in the middle and good light falling on it. Run a needle tip around the edge of the hole. Knit fabric is one long strand looped through itself, so a hole means a few of those loops have snapped and the rest are pulling away from the gap.
Check how far the damage runs. A hole the size of a pea takes a couple of minutes. If the wool around it feels thin, the repair has to reach out into sound knitting on every side.
Tip
Slide a darning mushroom or a piece of card under the hole before you start. It stops you stitching the front and back of the sweater together, which is the most common way this repair goes wrong.









