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180 pin roundel (circular edge) - lines

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There are 180 pins round the outer (and inner) edge. The length of the repeated pattern must fit without overlapping. The factors of 180 are 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, so any of these lengths would fit.

Bobbin lace grid