Picot Knot aka Butterfly Knot
Start by tying a regular flat knot.
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Leave a little space then tie another.
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Slide this up and pull outward on the large loops in between them, until you have the desired size.
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Create another flat knot.
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Push it up as you gently tug to get your desired width.
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Here is a sennit of picot knots.
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